pisiform bone vs os pisiforme

pisiform bone and os pisiforme both are nouns.

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

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

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

Other synonyms of pisiform bone include pisiform.

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