scaphoid bone vs wrist bone

scaphoid bone and wrist bone both are nouns.

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

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

Other hypernyms of scaphoid bone include carpal, carpal bone.

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