vomer vs os

vomer and os both are nouns.

Word	Noun	Adjective	Verb	Adverb
vomer	Yes	No	No	No
os	Yes	No	No	No

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

vomer: thin trapezoidal bone of the skull forming the posterior and inferior parts of the nasal septum
os: rigid connective tissue that makes up the skeleton of vertebrates

Other hypernyms of vomer include bone.

vomer (noun)	os (noun)
thin trapezoidal bone of the skull forming the posterior and inferior parts of the nasal septum	rigid connective tissue that makes up the skeleton of vertebrates
	a mouth or mouthlike opening