os tarsi fibulare vs os

os tarsi fibulare and os both are nouns.

Word	Noun	Adjective	Verb	Adverb
os tarsi fibulare	Yes	No	No	No
os	Yes	No	No	No

As nouns, os is a hypernym of os tarsi fibulare; that is, os is a word with a broader meaning than os tarsi fibulare:

Other hypernyms of os tarsi fibulare include bone.

os tarsi fibulare (noun)	os (noun)
the largest tarsal bone; forms the human heel	rigid connective tissue that makes up the skeleton of vertebrates
	a mouth or mouthlike opening