WordNet (r) 3.0 (2006):

John Hancock
    n 1: American revolutionary patriot who was president of the
         Continental Congress; was the first signer of the
         Declaration of Independence (1737-1793) [syn: Hancock,
         John Hancock]
    2: a person's own signature [syn: autograph, John Hancock]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "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