Synonyms of confirm in English:

confirm


See US English definition of confirm

See UK English definition of confirm

See Spanish definition of confirmar

verb

1‘written records confirm the archaeological evidence’

SYNONYMS
corroborate, bear out, verify, show the truth of, prove, validate, authenticate, substantiate, give substance to, justify, vouch for, vindicate, give credence to, support, uphold, back up
ANTONYMS

contradict, repudiate

2‘he confirmed that engineers would examine the road’

SYNONYMS
affirm, reaffirm, assert, reassert, give an assurance, assure someone, repeat, say again, state again, pledge, promise, guarantee
ANTONYMS

deny

3‘his appointment as ambassador was confirmed by the President’

SYNONYMS
ratify, validate, sanction, endorse, formalize, certify, underwrite, authorize, warrant, accredit, approve, recognize, agree to, consent to, accept
ANTONYMS

revoke