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Synonyms for Bone (same or very similar meaning)

WordNet sense 1 (the porous calcified substance from which bones are made):
osseous tissue

WordNet sense 2 (rigid connective tissue that makes up the skeleton of vertebrates):

WordNet sense 3 (a shade of white the color of bleached bones):
ivory, off-white, pearl

WordNet sense 4 (study intensively, as before an exam):
cram, drum, swot, get up, bone up, grind away, mug up, swot up

WordNet sense 5 (remove the bones from):

WordNet sense 6 (having bones especially many or prominent bones):
bony, boney

From the ODE community, based on WordNetadd/edit