Synonyms of certify in English:

certify


See definition of certify

verb

1‘the aircraft was certified as airworthy’

SYNONYMS
verify, guarantee, attest, validate, ratify, warrant, confirm, corroborate, substantiate, endorse, vouch for, testify to, provide evidence of, authenticate, document
bear witness to, bear out, give proof of, prove, demonstrate, back up, support

2‘the woman would be taken to a certified hospital for examination’

SYNONYMS
accredit, recognize, license, authorize, approve, warrant
empower, qualify, endorse, sanction, vouch for, put one's seal of approval on, appoint, give a certificate to, give a diploma to