WordNet (r) 3.0 (2006):

sky dive
    v 1: jump from an airplane and perform various maneuvers before
         opening one's parachute [syn: sky dive, skydive]

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "sky dive":
   bail out, belly buster, belly flop, belly whopper, brolly,
   cannonball, chaplain, churchman, chute, cleric, clerical, clerk,
   crash dive, dive, divine, drogue chute, drop, ecclesiastic, fall,
   gainer, harness, header, jackknife, jump, minister, nose dive,
   nose-dive, pack, padre, parachute, parachute jump, parson, pitch,
   plop, plummet, plump, plunge, plunk, pounce, pounce on,
   pounce upon, power dive, preacher, running dive, shroud lines,
   skin-dive, sky dive, sky pilot, sky-dive, sound, stationary dive,
   stoop, swan dive, swoop, swoop down, take a header, umbrella,
   vent