Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Thesaurus

certify

verb

Synonyms and Antonyms of certify

  1. 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. 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. 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




Learn More about certify


Seen and Heard

What made you want to look up certify? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a smart aleck

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

oily maudlin prompt angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ