Synonyms and related words :
John Hancock, OK, acceptance, affirmance, affirmation, approbation, approval, authentication, authorization, building permit, certification, confirmation, countersignature, endorsement, fishing license, go-ahead, green light, hunting license, license, nihil obstat, nod, notarization, okay, permission, permit, ratification, rubber stamp, sanction, seal, sigil, signature, signet, stamp, stamp of approval, subscription, the nod, validation, visa, vise, warrant