corroborate, formalize, validify, valudate, authenticate, justify, verify, revalidate, legitimize, prove, more...

invalidate, nullify, void

authenticate, certify, confirm, corroborate, endorse, ratify, substantiate, more...

void, public, self, click, new

affirm or confirm,   prove right,   give weight to,   to prove oneself,   to prove yourself,   seek approval,   seeking validation,   to prove something,   prove myself,   to be proven right