os pisiforme vs pisiform bone

os pisiforme and pisiform bone both are nouns.

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

As nouns, os pisiforme and pisiform bone are synonyms defined as:

os pisiforme and pisiform bone: a small wrist bone that articulates only with the triquetral

Other synonyms of os pisiforme include pisiform.

os pisiforme (noun)	pisiform bone (noun)
a small wrist bone that articulates only with the triquetral	a small wrist bone that articulates only with the triquetral