os pisiforme vs wrist bone

os pisiforme and wrist bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
os pisiforme	Yes	No	No	No
wrist bone	Yes	No	No	No

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

Other hypernyms of os pisiforme include carpal, carpal bone.

os pisiforme (noun)	wrist bone (noun)
a small wrist bone that articulates only with the triquetral	any of the eight small bones of the wrist of primates