lunate bone vs carpal bone

lunate bone and carpal bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
lunate bone	Yes	No	No	No
carpal bone	Yes	No	No	No

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

Other hypernyms of lunate bone include carpal, wrist bone.

lunate bone (noun)	carpal bone (noun)
one of the eight small wrist bones	any of the eight small bones of the wrist of primates