Synonyms and Antonyms of certify
1 to declare (something) to be true or genuine <experts certified the letter as indeed having been written by Abraham Lincoln> Synonyms attest, authenticate, avouch, testify (to), vouch (for), witness Related Words guarantee, warrant; affirm, assert, aver, avow, profess, vow
2 to give official or legal power to <certified her as a teacher> Synonyms accredit, authorize, charter [British], commission, empower, enable, invest, license (also licence), qualify, vest, warrantRelated Words approve, clear, credential, endorse (also indorse), OK (or okay), sanction; affirm, confirm, validate; inaugurate, induct, initiate, install, instate, swear in; allow, let, permit; enfranchise, entitle, privilegeNear Antonyms ban, bar, block, constrain, deny, disallow, disbar, discourage, disenfranchise, disfranchise, exclude, hinder, hold back, impede, inhibit, obstruct, prevent, shut out, stop; enjoin, forbid, interdict, outlaw, prohibit, proscribe, vetoAntonyms disqualify
3 to give evidence or testimony to the truth or factualness of <please bring in a doctor's note to certify that you were really sick> Synonyms argue, attest, authenticate, bear out, confirm, corroborate, substantiate, support, validate, verify, vindicateRelated Words avouch, back (up), testify (to), vouch (for), witness; guarantee, warrant; affirm, assert, aver, avow, declare, profess; demonstrate, document, establish, prove, reinforce (also reenforce)Near Antonyms contradict, gainsay; deny, disavow, disclaim; challenge, contest, dispute, questionAntonyms disprove, rebut, refute
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