WordNet (r) 3.0 (2006):

bones
    n 1: a percussion instrument consisting of a pair of hollow
         pieces of wood or bone (usually held between the thumb and
         fingers) that are made to click together (as by Spanish
         dancers) in rhythm with the dance [syn: bones,
         castanets, clappers, finger cymbals]

Moby Thesaurus II by Grady Ward, 1.0:

155 Moby Thesaurus words for "bones":
   anatomy, appendicular skeleton, ashes, axial skeleton, battery,
   being, bells, bird cage, body, bosom, breast, cadaver, carcass,
   carrion, castanets, celesta, chaff, chime, chimes, clappers, clay,
   clod, corpse, corpus, corpus delicti, crap game, crap shooting,
   craps, crash cymbal, crooked dice, crowbait, cubes, culm, cymbals,
   dead body, dead man, dead person, deadwood, decedent, dice, die,
   dishwater, draff, dregs, dry bones, dust, earth, embalmed corpse,
   esprit, exoskeleton, figure, filings, finger cymbals, flesh,
   food for worms, form, frame, gamelan, garbage, gash, glockenspiel,
   gong, guts, handbells, heart, heart of hearts, heartstrings,
   hogwash, hulk, husks, idiophone, inmost heart, inmost soul,
   innermost being, ivories, late lamented, leavings, lees,
   loaded dice, lyra, maraca, marimba, material body, metallophone,
   mortal remains, mummification, mummy, offal, offscourings,
   orchestral bells, organic remains, orts, parings, percussion,
   percussion instrument, percussions, percussive, person,
   physical body, physique, poker dice, potsherds, rags, raspings,
   rattle, rattlebones, refuse, relics, reliquiae, remains, scourings,
   scrap iron, scraps, scum, secret places, shards, shavings, sizzler,
   skeleton, slack, slag, slop, slops, snappers, soma, soul, spirit,
   stiff, stubble, sweepings, swill, tam-tam, tares, teeth,
   tenement of clay, the dead, the deceased, the defunct,
   the departed, the loved one, tintinnabula, tonitruone, torso,
   triangle, trunk, tubular bells, vibes, vibraphone, viscera,
   wastage, waste, waste matter, wastepaper, weeds, xylophone