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certify - 20 thesaurus results
| Main Entry: | certify |
| Part of Speech: | verb |
| Definition: | declare as true |
| Synonyms: | accredit, approve, ascertain, assure, attest, authenticate, authorize, aver, avow, commission, confirm, corroborate, endorse, guarantee, license, notify, okay, profess, reassure, sanction, show, state, swear, testify, validate, verify, vouch, witness, rubber-stamp |
| Antonyms: | contradict, counteract, deny, disavow, discredit, invalidate, reject, repudiate |
| Main Entry: | affirm |
| Part of Speech: | verb |
| Definition: | declare the truth of something |
| Synonyms: | assert, asseverate, attest, aver, avow, certify, cinch, clinch, confirm, declare, guarantee, ice*, insist, maintain, nail down*, okay, predicate, profess, pronounce, ratify, repeat, set, state, swear, testify, vouch, witness, avouch, cross heart, have a lock on, lock up, put on ice, rubber-stamp, say so, swear on bible, swear up and down |
| Antonyms: | deny, negate, nullify, veto |
* = informal/non-formal usage
| Main Entry: | attest |
| Part of Speech: | verb |
| Definition: | affirm, vouch for |
| Synonyms: | adjure, announce, argue, assert, authenticate, aver, bear out, bear witness, certify, confirm, corroborate, countersign, declare, demonstrate, display, exhibit, indicate, prove, ratify, seal, show, substantiate, support, sustain, swear, testify, uphold, verify, warrant, witness, asservate, give evidence |
| Antonyms: | deny |
| Main Entry: | authenticate |
| Part of Speech: | verb |
| Definition: | establish as real, genuine |
| Synonyms: | accredit, attest, authorize, bear out, certify, confirm, corroborate, endorse, guarantee, justify, prove, substantiate, validate, verify, vouch, warrant |
| Main Entry: | corroborate |
| Part of Speech: | verb |
| Definition: | back up information, story |
| Synonyms: | approve, authenticate, bear out, certify, check out, confirm, document, endorse, establish, justify, okay, prove, ratify, strengthen, substantiate, support, sustain, validate, verify, check on, check up, declare true, double check, give nod, rubber-stamp |
| Notes: | corroborate is used in a narrower context, usually by way of providing support for testimony in a legal proceeding; confirm is to lend support to a much wider array of things |
| Antonyms: | contradict, deny, disallow, disclaim, refute, reject |
| Main Entry: | ensure |
| Part of Speech: | verb |
| Definition: | guarantee; make secure |
| Synonyms: | arrange, assure, certify, cinch, clinch, confirm, effect, establish, guard, insure, nail down*, okay, protect, provide, safeguard, secure, warrant, lock on, lock up, make certain, make safe, make sure, put on ice, set out |
* = informal/non-formal usage
| Main Entry: | guarantee |
| Part of Speech: | verb |
| Definition: | pledge, promise |
| Synonyms: | affirm, angel, answer for, assure, attest, aver, back, bankroll, certify, confirm, endorse, ensure, evidence, evince, guaranty, insure, juice*, maintain, mortgage, protect, prove, reassure, secure, stake, support, swear, testify, vouch for, wager, warrant, witness, be surety for, bind oneself, cosign, get behind*, give bond, grubstake, make bail, make certain, make sure, pick up the check, pick up the tab, sign for, stand behind*, stand up for* |
| Antonyms: | break |
* = informal/non-formal usage
| Main Entry: | license |
| Part of Speech: | verb |
| Definition: | authorize |
| Synonyms: | accredit, allow, certify, commission, empower, enable, let, permit, privilege, sanction, suffer, warrant |
| Antonyms: | ban, prohibit, refuse, withhold |
| Main Entry: | okay |
| Part of Speech: | verb |
| Definition: | agree to |
| Synonyms: | accept, accredit, approve, authorize, certify, condone, confirm, consent to, endorse, give one's consent, give the go-ahead, give the green light, notarize, ok, pass, rubber-stamp, sanction, say yes to |
| Antonyms: | deny, disagree, refuse, reject, veto |
| Main Entry: | profess |
| Part of Speech: | verb |
| Definition: | declare, assert |
| Synonyms: | acknowledge, admit, affirm, allege, announce, asseverate, aver, avow, certify, claim, come out*, confess, confirm, croon, depose, dissemble, fake, feign, maintain, make out, own, predicate, pretend, proclaim, purport, sing*, spiel*, spout*, state, stump*, vouch, act as if, avouch, blow hot air, constate, cross heart, get off chest, get on soapbox, open up, own up, say so, soapbox, swear on bible, swear up and down, talk big |
| Antonyms: | conceal, hide |
* = informal/non-formal usage
| Main Entry: | prove |
| Part of Speech: | verb |
| Definition: | establish facts; put to a test |
| Synonyms: | affirm, analyze, ascertain, assay, attest, authenticate, back, bear out, certify, check, confirm, convince, corroborate, declare, demonstrate, determine, document, end up, evidence, evince, examine, experiment, explain, find, fix, justify, manifest, pan out*, result, settle, show, substantiate, sustain, test, testify, trial, try, turn out, uphold, validate, verify, warrant, witness, add up, have a case, make evident, show clearly, show once and for all |
| Antonyms: | discredit, disprove, theorize, hypothesize |
* = informal/non-formal usage
| Main Entry: | ratify |
| Part of Speech: | verb |
| Definition: | affirm, authorize |
| Synonyms: | accredit, approve, authenticate, bear out, bind, bless, certify, commission, confirm, consent, corroborate, endorse, establish, go for*, license, okay*, rubber stamp*, sanction, sign, substantiate, uphold, validate, give stamp of approval |
| Antonyms: | deny, disaffirm, disagree, renounce, revoke, veto |
* = informal/non-formal usage
| Main Entry: | sanction |
| Part of Speech: | verb |
| Definition: | authorize, confirm |
| Synonyms: | accredit, allow, approve, back, bless, certify, commission, countenance, empower, endorse, go for*, license, okay*, permit, ratify, support, vouch for, warrant, get behind*, give the go-ahead, give the green light, give the nod |
| Antonyms: | disapprove, prevent, refuse, veto |
* = informal/non-formal usage
| Main Entry: | testify |
| Part of Speech: | verb |
| Definition: | vouch for; give testimony |
| Synonyms: | affirm, announce, argue, assert, attest, bear witness, bespeak, betoken, certify, corroborate, cross one's heart, declare, demonstrate, depone, depose, evince, give evidence, give facts, give one's word, indicate, make evident, mount, point to, prove, say so, show, sing*, stand up for, state, swear, swear to, swear up and down, token, warrant, witness |
* = informal/non-formal usage
| Main Entry: | validate |
| Part of Speech: | verb |
| Definition: | ascertain the truth, authenticity of something |
| Synonyms: | John Hancock*, approve, authenticate, authorize, bear out, certify, confirm, constitute, corroborate, endorse, justify, legalize, okay*, ratify, sanction, substantiate, verify, give stamp of approval, give the go-ahead, give the green light, give the nod, legitimize, make binding, make legal, make stick, rubber-stamp, set seal on, sign off on |
| Antonyms: | refuse, reject, veto |
* = informal/non-formal usage
| Main Entry: | verify |
| Part of Speech: | verb |
| Definition: | confirm, validate |
| Synonyms: | attest, authenticate, bear out, certify, check, check out, corroborate, debunk, demonstrate, document, establish, eye*, find out, hold up, justify, pan out*, peg*, prove, settle, size*, substantiate, support, test, try, add up, check up, check up on, double-check, eyeball, make certain, make sure, size up*, stand up* |
| Antonyms: | discredit, disprove, invalidate |
* = informal/non-formal usage
| Main Entry: | vouch |
| Part of Speech: | verb |
| Definition: | give assurance |
| Synonyms: | affirm, answer for, assert, asseverate, assure, avert, avow, back, certify, confirm, contend, corroborate, declare, guarantee, maintain, okay*, predicate, profess, prove, sponsor, substantiate, support, testify, uphold, verify, vow, warrant, witness, act as a witness, attest to, be responsible for, bear testimony, cosign, get behind*, give an affidavit, put forth, rubber-stamp, say so, sign for, stand up for*, swear to, swear up and down |
| Antonyms: | deny, disavow, refute, reject, renounce |
* = informal/non-formal usage
| Main Entry: | warrant |
| Part of Speech: | verb |
| Definition: | guarantee, justify, authorize |
| Synonyms: | affirm, answer for, approve, argue, assert, assure, attest, back, bear out, call for, certify, claim, commission, contend, declare, defend, delegate, demand, empower, endorse, ensure, entitle, excuse, explain, guaranty, insure, license, maintain, necessitate, permit, pledge, privilege, promise, require, sanction, secure, sponsor, state, stipulate, swear, undertake, underwrite, uphold, vindicate, vouch for, vow, avouch, give grounds for, stand behind, take an oath |
| Main Entry: | acknowledge |
| Part of Speech: | verb |
| Definition: | verbally recognize authority |
| Synonyms: | accede, accept, acquiesce, agree, allow, approve, certify, defend, endorse, grant, own, ratify, recognize, support, uphold, yield, attest to, defer to, subscribe to, take an oath |
| Antonyms: | forswear, ignore, refuse, renounce, repudiate |
| Main Entry: | confirm |
| Part of Speech: | verb |
| Definition: | ratify, validate, prove |
| Synonyms: | affirm, approve, attest, authenticate, back, bear out, bless, buy, certify, check, check out, corroborate, debunk, endorse, establish, explain, justify, okay, sanction, settle, sign, subscribe, substantiate, support, thumbs up*, uphold, verify, vouch, warrant, witness, circumstantiate, double-check, give green light, give high sign, give stamp of approval, give the go-ahead, give the nod, lap up, make good, make sure, rubber-stamp, sign off on, size up, underpin |
| Antonyms: | annul, cancel, contradict, destroy, disprove, invalidate, oppose, veto, void |
* = informal/non-formal usage
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
