WordNet (r) 3.0 (2006):

deckhand
    n 1: a member of a ship's crew who performs manual labor [syn:
         deckhand, roustabout]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "deckhand":
   bakehead, black gang, boilerman, bungs, cabin boy, chips,
   commissary steward, complement, deckie, fireman, gun loader,
   gunner, hand, hospital steward, landing signalman, mail orderly,
   navigator, oiler, purser, radio operator, roustabout, snip, snips,
   sparks, steward, stewardess, stoker, torpedoman, watch, yeoman