heelbone vs bone

heelbone and bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
heelbone	Yes	No	No	No
bone	Yes	Yes	Yes	No

As nouns, bone is a hypernym of heelbone; that is, bone is a word with a broader meaning than heelbone:

Other hypernyms of heelbone include os.

heelbone (noun)	bone (noun)
the largest tarsal bone; forms the human heel	a shade of white the color of bleached bones
	rigid connective tissue that makes up the skeleton of vertebrates
	the porous calcified substance from which bones are made

heelbone (adjective)	bone (adjective)
	consisting of or made up of bone

heelbone (verb)	bone (verb)
	remove the bones from
	study intensively, as before an exam