Trial synonym

randomized study

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— A category of studies comparing two or more treatments in which random allocation is used to assign participants to treatment comparison groups


randomized control trial, RCT, randomized trial, randomized controlled trial (should not be used)

Full explanation:

Randomized studies, commonly called randomized trials, are a treatment comparison in which two or more treatments, possibly including a placebo or withholding a treatment, are compared after random allocation of participants to treatment comparison groups.

Random allocation ensures that each participant has a known (usually an equal) chance of being assigned to any given group. This results in treatment comparison groups that are similar in terms of prognostic variables, whether or not these have been recognised.

Thus, there is generally a lower risk of allocation bias in randomized studies than there is in non-randomized studies.

We advise against using the term "randomized controlled trial" because of ambiguity about what the adjective "controlled" adds.

See also:

non-randomized study  ·  random allocation

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← random allocationreference standard test →

free trial synonym | English Thesaurus




1  buckshee    (Brit. slang)  complimentary, for free    (informal)  for nothing, free of charge, gratis, gratuitous, on the house, unpaid, without charge  

2  at large, at liberty, footloose, independent, liberated, loose, off the hook    (slang)  on the loose, uncommitted, unconstrained, unengaged, unfettered, unrestrained  

3  able, allowed, clear, disengaged, loose, open, permitted, unattached, unengaged, unhampered, unimpeded, unobstructed, unregulated, unrestricted, untrammelled  

4    (with)     of  above, beyond, deficient in, devoid of, exempt from, immune to, lacking (in), not liable to, safe from, sans    (archaic)  unaffected by, unencumbered by, untouched by, without  

5  autarchic, autonomous, democratic, emancipated, independent, self-governing, self-ruling, sovereign  

6  at leisure, available, empty, extra, idle, not tied down, spare, unemployed, uninhabited, unoccupied, unused, vacant  

7  casual, easy, familiar, forward, frank, free and easy, informal, laid-back    (informal)  lax, liberal, loose, natural, open, relaxed, spontaneous, unbidden, unceremonious, unconstrained, unforced, uninhibited  

8  big    (informal)  bounteous, bountiful, charitable, eager, generous, hospitable, lavish, liberal, munificent, open-handed, prodigal, unsparing, unstinting, willing  

9  free and easy    casual, easy-going, informal, laid-back    (informal)  lax, lenient, liberal, relaxed, tolerant, unceremonious  

10  at no cost, for love, gratis, without charge  

11  abundantly, copiously, freely, idly, loosely  

12  deliver, discharge, disenthrall, emancipate, let go, let out, liberate, loose, manumit, release, set at liberty, set free, turn loose, unbridle, uncage, unchain, unfetter, unleash, untie  

13  clear, cut loose, deliver, disengage, disentangle, exempt, extricate, ransom, redeem, relieve, rescue, rid, unburden, undo, unshackle  

2 & 3  bound, captive, confined, dependent, fettered, immured, incarcerated, occupied, restrained, restricted, secured  

7  constrained, formal, official, stiff, unnatural  

8  close, mean, mingy    (informal)  stingy, tight, ungenerous  

12 & 13  confine, imprison, incarcerate, inhibit, limit, restrain, restrict, straiten  

affray    (Law)  bagarre, brawl, donnybrook, dust-up    (informal)  fight, fracas, melee or mêlée, riot, row, scrimmage, shindig    (informal)  shindy    (informal)  

free hand  
    n  authority, blank cheque, carte blanche, discretion, freedom, latitude, liberty, scope  

clear, safe, scatheless    (archaic)  undamaged, unharmed, unhurt, uninjured, unpunished, unscathed, without a scratch  

  • BOGOF  n. buy one, get one free

    It's a common form of sales promotion. This marketing technique is universally known in the marketing industry by the acronym BOGOF.

  • weisure  n. free time spent taking care also of work-related tasks

    formed based on "work" and "leisure"

  • FOB  n. Free On Board: A legal term meaning that when the seller loads merchandise for transportation, he bears full responsibility for it but if the merchandise is later lost or harmed, the buyer suffers the loss.
  • copyleft  n. 1. using copyright law to make a piece of work freely available and allowing its free distribution and modification (as long as its derivate versions follow the same copyright rules)
  • staycation  n. free time that you spend in or very near your usual place of living
  • open source  adj. refers to a product or service whose design, blueprint or code is free to use and modify

    Examples of open source projects: Linux, Mozzila Firefox (softwares); DIY open drones (drone design), arduino (electronics)

  • intangible right  n. legal exclusive right of a person in pure virtual property which he can dispose of with its free will.


Alphabetical index

Welcome to English-Thesaurus Collins dictionary ("Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995").

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Synonyms of trial in English:


See US English definition of trial

See UK English definition of trial

See Spanish definition of proceso


1‘the trial is expected to last several weeks’


court case, case, lawsuit, suit, hearing, inquiry, tribunal, litigation, judicial proceedings, legal proceedings, proceedings, legal action

court martial

appeal, retrial

2‘the drug is still undergoing clinical trials’


test, try-out, experiment, pilot study

examination, check, assessment, evaluation, appraisal

test period, trial period, test run, trial run, probation, testing, dummy run

audition, screen test

informal dry run

technical assay

3‘Eleanor could be a bit of a trial at times’


nuisance, pest, bother, irritant, source of annoyance, source of irritation, worry, problem, inconvenience, vexation, plague, source of aggravation, thorn in one's flesh, the bane of one's life, one's cross to bear


informal pain, pain in the neck, pain in the backside, headache, drag, pill, nightmare

Scottish informal skelf

North American informal pain in the butt, nudnik, burr in someone's saddle, burr under someone's saddle

Australian informal fair cow

British informal, dated blister

British vulgar slang pain in the arse

North American vulgar slang pain in the ass

4‘a long account of her trials and tribulations’


trouble, worry, anxiety, burden, affliction, ordeal, tribulation, adversity, hardship, tragedy, trauma, reverse, setback, difficulty, problem, misfortune, bad luck, stroke of bad luck, ill fortune, mishap, misadventure

suffering, distress, misery, wretchedness, unhappiness, sadness, woe, grief, pain

informal hassle

archaic travails


1‘a three-month trial period’


test, experimental, pilot, exploratory, probationary, provisional


1‘the electronic cash card has been trialled by several banks’


test, try out, carry out trials on, put to the test, put through its paces, experiment with


technical assay



This shows grade level based on the word's complexity.

[ trahy-uhl, trahyl ]

/ ˈtraɪ əl, traɪl /

This shows grade level based on the word's complexity.


  1. the examination before a judicial tribunal of the facts put in issue in a cause, often including issues of law as well as those of fact.
  2. the determination of a person's guilt or innocence by due process of law.

the act of trying, testing, or putting to the proof.

test; proof.

an attempt or effort to do something.

a tentative or experimental action in order to ascertain results; experiment.

the state or position of a person or thing being tried or tested; probation.

subjection to suffering or grievous experiences; a distressed or painful state: comfort in the hour of trial.

an affliction or trouble.

a trying, distressing, or annoying thing or person.

Ceramics. a piece of ceramic material used to try the heat of a kiln and the progress of the firing of its contents.


of, relating to, or employed in a trial.

done or made by way of trial, proof, or experiment.

used in testing, experimenting, etc.

acting or serving as a sample, experimental specimen, etc.: a trial offer.


2, 3, 5examination.

4endeavor, essay, struggle.

7grief, tribulation, distress, sorrow, trouble, hardship.

See synonyms for trial on



We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.

Question 1 of 8

Which of the following words describes “sky blue”?

Idioms about trial

    on trial,
    1. undergoing examination before a judicial tribunal.
    2. undergoing a probationary or trial period.

Origin of trial

First recorded in 1520–30; try + -al2

synonym study for trial

2, 3, 5. Trial , experiment , test imply an attempt to find out something or to find out about something. Trial is the general word for a trying of anything: articles sent for ten days' free trial.Experiment is a trial conducted to prove or illustrate the truth or validity of something, or an attempt to discover something new: an experiment in organic chemistry.Test is a more specific word, referring to a trial under approved and fixed conditions, or a final and decisive trial as a conclusion of past experiments: a test of a new type of airplane.7. See affliction.





trail, trial

Words nearby trial

triacylglycerol lipase, triad, triadelphous, triad syndrome, triage, trial, trial and error, trial balance, trial balloon, trial by battle, trial by fire Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021


What does trial mean?

In general, a trial is a test or an experiment.

Most commonly, the word refers to a criminal trial in a courtroom before a judge and jury. It is also often used in a scientific context to refer to things like clinical trials and drug trials. It can also refer to a hardship. It is commonly used in phrases like trial and error and trial by fire. It is most commonly used as a noun but it can also be used as an adjective and a verb.

Example: There are 500 people participating in our research trial for a new heart medication.

Where does trial come from?

The first records of trial come from the 1500s. It comes from the Anglo-French trier, meaning “to try” (the word try comes from the same term).

In a general sense, a trial of something is a test of it. This sense is seen in the common phrase trial and error, which refers to a process of continually trying or testing something, making mistakes, and trying and testing it again until you get it right. If you decide to test something out for a limited amount of time, you do so with a trial run or during a trial period.

Trial can be used to describe an ordeal or situation that subjects someone to trying times, testing their strength or endurance, as in the expression trials and tribulations. A trial by fire is a test of one’s abilities under pressure.

A trial by jury is also a kind of test, and if you’re the one on trial, you’ll need a trial lawyer. In a scientific context, a clinical trial is an investigation of a new medical treatment to see if it will work in humans. Pharmaceutical trials and drug trials test whether new medicines are safe and effective. Such medicines are said to be in the process of being trialled.

Athletes in certain sports must compete against other athletes in trials in order to qualify for a competition. This sense is seen in phrases like Olympic trial andtime trial. 

Trial has many other specific meanings but they all deal with testing something, trying something out temporarily, or performing an experiment.

Did you know ... ?

What are some other forms related to trial?

  • intertrial (adjective)
  • mistrial (noun)
  • nontrial (noun)
  • posttrial (adjective)
  • retrial (noun)

What are some synonyms for trial?

What are some words that share a root or word element with trial



What are some words that often get used in discussing trial?


How is trial used in real life?

The main uses of trial—legal trials, scientific trials, and personal trials—are usually seen in a serious context.



Try using trial!

True or False? 

Trial can only be used as a noun.

Words related to trial

preliminary, exploratory, experiment, testing, investigation, examination, struggle, probation, effort, case, litigation, tribunal, suit, prosecution, hearing, contest, arraignment, action, indictment, lawsuit

How to use trial in a sentence

  • There are about 36,000 digital marketing agencies worldwide, based on our research on platforms like UpCity, Clutch, and our trials and users.

    How would an SEO agency be built today? Part 2: Current business model(s)|Sponsored Content: SEOmonitor|September 16, 2020|Search Engine Land

  • Multiple companies are reporting positive results from their phase 1 trials.

    America Is About to Lose Its 200,000th Life to Coronavirus. How Many More Have to Die?|by Stephen Engelberg|September 14, 2020|ProPublica

  • Prior to the trial, the Financial Conduct Authority said policies held by around 370,000 customers could be affected.

    Got interruption insurance? These companies found it’s useless in the age of COVID-19|Bernhard Warner|September 12, 2020|Fortune

  • AstraZeneca’s clinical trial hold stemmed from adverse events and may well proceed into further clinical development.

    The rollercoaster of COVID-19 vaccines|Sy Mukherjee|September 10, 2020|Fortune

  • We never did a trial that half the people were randomized to get them and half were not.

    Wearing a mask could protect you from COVID-19 in more ways than you think|Kat Eschner|September 10, 2020|Popular-Science

  • Meanwhile, almost exactly 30 years after the trial, the judge left his home to board a steamboat and was never heard from again.

    New York’s Most Tragic Ghost Loves Minimalist Swedish Fashion|Nina Strochlic|January 8, 2015|DAILY BEAST

  • Seventy-two adults between the ages of 18 and 50 are participating in the trial, led by the pediatrics department at Oxford.

    The Race for the Ebola Vaccine|Abby Haglage|January 7, 2015|DAILY BEAST

  • The next phase of the trial consists of vaccinating Ebola workers on the front lines.

    The Race for the Ebola Vaccine|Abby Haglage|January 7, 2015|DAILY BEAST

  • He lambasts the case as without evidence, an unfair trial, and damaging for the American reputation.

    Of Cuban Spies, a Baby, and a Filmmaker: The Strange Tale of the Cuban Five|Nina Strochlic|December 28, 2014|DAILY BEAST

  • While in pre-trial detention, Krivov undertook two hunger strikes.

    Behind Bars for the Holidays: 11 Political Prisoners We Want to See Free In 2015|Movements.Org|December 25, 2014|DAILY BEAST

  • The challenge was accepted and the hay-wagon driven round and the trial commenced.

    The Book of Anecdotes and Budget of Fun;|Various

  • No doubt it will be a trial for Miss Rowan, but I think she would feel better to have her father buried here.

    Raw Gold|Bertrand W. Sinclair

  • He consented to the trial, receiving Planner's solemn promise that, in the event of failure, it should be the last.

    Blackwood's Edinburgh Magazine, No. CCCXXXIX. January, 1844. Vol. LV.|Various

  • British parliament passed an act for transporting Americans to England for trial.

    The Every Day Book of History and Chronology|Joel Munsell

  • Receiving small encouragement in England, he applied to sugar-cane planters to give his engines a trial in the West Indies.

    Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick

British Dictionary definitions for trial (1 of 2)



  1. the act or an instance of trying or proving; test or experiment
  2. (as modifier)a trial run
  1. the judicial examination of the issues in a civil or criminal cause by a competent tribunal and the determination of these issues in accordance with the law of the land
  2. the determination of an accused person's guilt or innocence after hearing evidence for the prosecution and for the accused and the judicial examination of the issues involved
  3. (as modifier)trial proceedings

an effort or attempt to do somethingwe had three trials at the climb

trouble or grief

an annoying or frustrating person or thing

(often plural)a competition for individualssheepdog trials

a motorcycling competition in which the skills of the riders are tested over rough ground

ceramicsa piece of sample material used for testing the heat of a kiln and its effects

on trial
  1. undergoing trial, esp before a court of law
  2. being tested, as before a commitment to purchase

verbtrials, triallingortrialled

(tr)to test or make experimental use of (something)the idea has been trialled in several schools

Derived forms of trial

trialling, noun

Word Origin for trial

C16: from Anglo-French, from trier to try

British Dictionary definitions for trial (2 of 2)


a grammatical number occurring in some languages for words in contexts where exactly three of their referents are described or referred to

(modifier)relating to or inflected for this number

Word Origin for trial

C19: from tri- + -al1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Idioms and Phrases with trial

In addition to the idioms beginning with trial

  • trial and error
  • trial balloon
  • trial by fire
  • trials and tribulations

also see:

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.


Synonym trial

Trial synonyms


An examining or being examined; investigation; inspection; checkup; scrutiny; inquiry; testing


An enclosing frame or casing.


Any race, game, debate, etc. in which individuals or teams compete with one another to determine the winner


By extension, any process in which a person is subject to questioning.


The definition of an ordeal is a very severe test, trial or difficult or painful experience.


The definition of known is something of which people are aware.


The act of impeaching a public official, either elected or appointed, before a tribunal charged with determining the facts of the matter


The most important or exciting work or activity in a specific field or area:

legal proceedings


A demand for something as rightful or due.


The definition of a counterclaim is a claim made to rebut accusations against you.


An action taken to recover wrongfully taken property, rather than recovering only the value of that property from the defendant; a court order authorizing the return of the plaintiff’s wrongfully taken property.


A pursuing of a lawsuit or a criminal trial; the party pursuing a criminal prosecution; the carrying out of any activity or plan.


(--- Law) A reference to a previous court decision or other authority for a point of law, usually by case title and other information.

court action

judicial contest


An instance of abnormal, especially excessive electrical activity in the brain, causing symptoms such as involuntary muscle movements and the loss of awareness or the ability to pay attention.

bill of divorce

court clash


Something suffered; pain, distress, or injury


A place, time, or situation in which different social forces or intellectual influences come together and cause new developments:


Great misery or distress, as from oppression; deep sorrow


Something which causes pain, suffering, distress or agony.

trying experience


(Informal) A cause of worry, annoyance, or trouble


(Informal) A source of annoyance; a nuisance:


Of, relating to, or having the function of an inquisitor.


The definition of judiciary is a person or thing associated with a court of law or judges.



The definition of analysis is the process of breaking down a something into its parts to learn what they do and how they relate to one another.


Great suffering, as from worry, grief, or pain; agony


The intentional and overt taking of a substantial step toward the commission of a crime that falls short of completing the crime. The mere planning of a crime, as well as soliciting another to commit the crime, does not constitute an attempt to commit the crime. Attempt is a crime distinct from the offense that the criminal was attempting to commit. Various legal tests are used to determine when, between planning a crime and committing it, a person’s actions constitute an attempt. See also conspiracy and solicitation.


Effort is defined as the use of physical or mental energy, the act or result of trying to do something.


The definition of an endeavor is an attempt with a lot of effort.


Evidence is defined as something that gives proof or leads to a conclusion.


The act or an instance of exerting, especially a strenuous effort.


Any action or process designed to find out whether something is effective, workable, valid, etc.


A thing hard to bear; specific cause of discomfort or suffering, as poverty, pain, etc.


A procedure following conviction that permits the party found guilty to be released without doing prison time, subject to conditions that are placed upon him or her by the court. Violation of any of those conditions can lead to probation being revoked and the person being remanded to confinement.


(Law) The establishment of the truth or falsity of an allegation by evidence.



A thrust, as with a knife or dagger


A strenuous effort in the face of difficulty:


A procedure for critical evaluation; a means of determining the presence, quality, or truth of something; a trial:


(Law) A proceeding in which opposing parties in a dispute present evidence and make arguments on the application of the law before a judge or jury:


An opportunity to prove, or a test to determine, fitness for a place on an athletic team, a role in a play, etc.


The provision made for a parent to spend time with a child who is in the physical custody of another.


A cause of sorrow; affliction; trouble


Clearly developed or firmly decided:


Known to be valid, effective, or genuine


Fortuitous elegance; unstudied grace; "” used especially of language.


An agreement or a treaty to end hostilities:


trial synonym | English Thesaurus




1  assay, audition, check, dry run    (informal)  examination, experience, experiment, probation, proof, test, testing, test-run  

2  contest, hearing, industrial tribunal, judicial examination, litigation, tribunal  

3  attempt, crack    (informal)  effort, endeavour, go    (informal)  shot    (informal)  stab    (informal)  try, venture, whack    (informal)  

4  adversity, affliction, burden, cross to bear, distress, grief, hardship, hard times, load, misery, ordeal, pain, suffering, tribulation, trouble, unhappiness, vexation, woe, wretchedness  

5  bane, bother, drag    (informal)  hassle    (informal)  irritation, nuisance, pain in the arse    (taboo informal)  pain in the neck    (informal)  pest, plague    (informal)  thorn in one's flesh, vexation  

6  experimental, exploratory, pilot, probationary, provisional, testing  



    (trials  plural  )

1    n-var  A trial is a formal meeting in a law court, at which a judge and jury listen to evidence and decide whether a person is guilty of a crime.  
New evidence showed the police lied at the trial..., He's awaiting trial in a military court on charges of plotting against the state..., They believed that his case would never come to trial.    

2    n-var  A trial is an experiment in which you test something by using it or doing it for a period of time to see how well it works. If something is on trial, it is being tested in this way.  
They have been treated with this drug in clinical trials..., The robots have been on trial for the past year...    

3    n-count  If someone gives you a trial for a job, or if you are on trial, you do the job for a short period of time to see if you are suitable for it.  
usu sing, also on N  
He had just given a trial to a young woman who said she had previous experience...    

4    n-count  If you refer to the trialsof a situation, you mean the unpleasant things that you experience in it.  
usu pl, N of n  
...the trials of adolescence.    

5    n-count  In some sports or outdoor activities, trials are a series of contests that test a competitor's skill and ability.  
usu pl, supp N  
He has been riding in horse trials for less than a year., ...Dovedale Sheepdog Trials.    

6  If you do something bytrial and error, you try several different methods of doing it until you find the method that works properly.  
trial and error    phrase  oft by/through PHR  
Many drugs were found by trial and error...    

7  If someone is on trial, they are being tried in a court of law.  
on trial    phrase  v-link PHR, PHR after v  
He is currently on trial accused of serious drugs charges...    

8  If you say that someone or something is on trial, you mean that they are in a situation where people are observing them to see whether they succeed or fail.  
on trial    phrase  v-link PHR, PHR after v  
The President will be drawn into a damaging battle in which his credentials will be on trial.    

9  If someone stands trial, they are tried in court for a crime they are accused of.  
to stand trial    phrase  V inflects, oft PHR for n  

clinical trial      (clinical trials  plural  )When a new type of drug or medical treatment undergoes clinical trials, it is tested directly on patients to see if it is effective.    n-count  
Two rival laser surgery systems are undergoing clinical trials in the US.    

show trial      (show trials  plural  )People describe a trial as a show trial if they believe that the trial is unfair and is held for political reasons rather than in order to find out the truth.    n-count  
  (disapproval)   ...the show trials of political dissidents.    

time trial      (time trials  plural  )In cycling and some other sports, a time trial is a contest in which competitors race along a course individually, in as fast a time as possible, instead of racing directly against each other.    n-count  

trial balloon      (trial balloons  plural  )A trial balloon is a proposal that you mention or an action that you try in order to find out other people's reactions to it, especially if you think they are likely to oppose it.  
  (mainly AM)    n-count  
They floated the trial balloon of actually cutting Social Security.    

trial run      (trial runs  plural  )A trial run is a first attempt at doing something to make sure you can do it properly.    n-count  


Alphabetical index

Welcome to English-Thesaurus Collins dictionary ("Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995").

Type the word that you look for in the search box above. The results will include words and phrases from the general dictionary as well as entries from the collaborative one.


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I would like to participate, if you don't mind. " We will not hear such dialogues in ordinary life. Only in a closed-closed party, with forty-year-old swingers, battered by life.

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