pyramidal bone vs carpal

pyramidal bone and carpal both are nouns.

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

As nouns, carpal is a hypernym of pyramidal bone; that is, carpal 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: any of the eight small bones of the wrist of primates

Other hypernyms of pyramidal bone include carpal bone, wrist bone.

pyramidal bone (noun)	carpal (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

pyramidal bone (adjective)	carpal (adjective)
	of or relating to the wrist