THESAURUS
john hancock
OK, X, acceptance, affirmance, affirmation, approbation, approval, authentication, authorization, autograph, certification, christcross, cipher, confirmation, countermark, countersign, countersignature, counterstamp, cross, device, endorsement, go-ahead, green light, hand, imprimatur, initials, mark, mark of signature, monogram, nod, notarization, okay, permission, ratification, rubber stamp, sanction, seal, sigil, sign manual, signature, signet, stamp, stamp of approval, subscription, the nod, validation, visa, vise, warrant