pyramidal bone vs carpal bone

pyramidal bone and carpal bone both are nouns.

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

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

pyramidal bone: a wrist bone that articulates with the pisiform and hamate and lunate bones
carpal bone: any of the eight small bones of the wrist of primates

Other hypernyms of pyramidal bone include carpal, wrist bone.

pyramidal bone (noun)	carpal bone (noun)
a wrist bone that articulates with the pisiform and hamate and lunate bones	any of the eight small bones of the wrist of primates