Synonyms of authenticate

1 Syllable

vouch

2 Syllables

confirms, proven, warrant, confirm, prove, attest

3 Syllables

ratifying, endorse, endorsing, certifying, ratified, guarantee, attesting, confirming, attested, ratify, certify, accredit, verifies, certified, justify, ratifies, verify

4 Syllables

notarizing, validating, notarize, validate, authorize, substantiate, demonstrated, substantiating, validated, demonstrate, notarized, substantiated

5 Syllables

corroborated, corroborating, corroborate