Synonyms of validate

2 Syllables
proven, reassert, confirm, okay, prove, sustains, sustain, sanction
3 Syllables
mandating, justified, ratifying, endorse, justifying, certifying, ratified, rubber-stamp, ratify, declare, certify, declaring, reasserted, certified, approve, justify, justifies, sustaining, ratifies, reasserting, verify
4 Syllables
notarizing, allegate, notarize, authorize, substantiate, legalize, demonstrated, substantiating, demonstrate, notarized, constitute, substantiated
5 Syllables
legitimize, corroborated, authenticating, corroborating, corroborate, authenticated, authenticate
7 Syllables
experimentalize