calf bone vs leg bone

calf bone and leg bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
calf bone	Yes	No	No	No
leg bone	Yes	No	No	No

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

calf bone: the outer and thinner of the two bones of the human leg between the knee and ankle
leg bone: a bone of the leg

calf bone (noun)	leg bone (noun)
the outer and thinner of the two bones of the human leg between the knee and ankle	a bone of the leg