| 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, rubber-stamp, sanction, show, state, swear, testify, validate, verify, vouch, witness |
Antonyms: |
contradict, counteract, deny, disavow, discredit, invalidate, reject, repudiate |
| Main Entry: | accredit |
| Part of Speech: | verb |
| Definition: | give authorization or control |
Synonyms: |
appoint, approve, authorize, certify, commission, empower, enable, endorse, entrust, guarantee, license, okay, recognize, sanction, vouch for |
Antonyms: |
deny, disapprove, reject |
| Main Entry: | acknowledge |
| Part of Speech: | verb |
| Definition: | verbally recognize authority |
Synonyms: |
accede, accept, acquiesce, agree, allow, approve, attest to, certify, defend, defer to, endorse, grant, own, ratify, recognize, subscribe to, support, take an oath, uphold, yield |
Antonyms: |
forswear, ignore, refuse, renounce, repudiate |
| Main Entry: | affirm |
| Part of Speech: | verb |
| Definition: | declare the truth of something |
Synonyms: |
assert, asseverate, attest, aver, avouch, avow, certify, cinch, clinch, confirm, cross heart, declare, guarantee, have a lock on, ice*, insist, lock up, maintain, nail down, okay, predicate, profess, pronounce, put on ice, ratify, repeat, rubber-stamp, say so, set, state, swear, swear on bible, swear up and down, testify, vouch, witness |
Antonyms: |
deny, negate, nullify, veto |
| Main Entry: | allow |
| Part of Speech: | verb |
| Definition: | permit an action |
Synonyms: |
accord, accredit, admit, approve, authorize, be big, be game for, bear, brook, certify, commission, consent, empower, endorse, endure, favor, free up, give a blank check, give carte blanche, give leave, give permission, give the go-ahead, give the green light, go along with, grant permission, hear of, hold with, indulge, let, license, live with, oblige, okay, pass, pass on, put up with, recognize, release, sanction, sit still for, stand, suffer, support, take kindly to, tolerate, warrant |
Antonyms: |
deny, disallow, disapprove, forbid, prohibit, protest, refuse, reject, resist, withstand |
| Main Entry: | approve |
| Part of Speech: | verb |
| Definition: | allow, authorize |
Synonyms: |
accede, accept, accredit, acquiesce, advocate, affirm, agree, assent, authorize, back*, bless*, boost, buy, buy into, certify, charter, concur, confirm, consent, dig*, empower, encourage, endorse, establish, get behind, give go-ahead, go along with, groove*, hats off to, lap up, license, maintain, make law, make valid, mandate, okay, permit, pronounce, push for, ratify, recommend, sanction, seal, second, sign, sign off on, stump for, subscribe to, support, thumbs up, uphold, validate |
Antonyms: |
disallow, disapprove, invalidate, oppose, refuse, reject |
| Main Entry: | assure |
| Part of Speech: | verb |
| Definition: | promise |
Synonyms: |
affirm, attest, aver, brace up, buck up, certify, confirm, give one's word, guarantee, pledge, swear, vouch for, vow |
| Main Entry: | attest |
| Part of Speech: | verb |
| Definition: | affirm, vouch for |
Synonyms: |
adjure, announce, argue, assert, asservate, authenticate, aver, bear out, bear witness, certify, confirm, corroborate, countersign, declare, demonstrate, display, exhibit, give evidence, indicate, prove, ratify, seal, show, substantiate, support, sustain, swear, testify, uphold, verify, warrant, witness |
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: | confirm |
| Part of Speech: | verb |
| Definition: | ratify, validate, prove |
Synonyms: |
affirm, approve, attest, authenticate, back, bear out, bless, buy, certify, check, check out, circumstantiate, corroborate, debunk, double-check, endorse, establish, explain, give green light, give high sign, give stamp of approval, give the go-ahead, give the nod, justify, lap up, make good, make sure, okay, rubber-stamp, sanction, settle, sign, sign off on, size up, subscribe, substantiate, support, thumbs up, underpin, uphold, verify, vouch, warrant, witness |
| 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: |
annul, cancel, contradict, destroy, disprove, invalidate, oppose, veto, void |