scaphoid bone vs carpal

scaphoid bone and carpal both are nouns.

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

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

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

scaphoid bone (noun)	carpal (noun)
the largest wrist bone on the thumb side	any of the eight small bones of the wrist of primates

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