anatomy vs azygos

anatomy is a noun but azygos is not a noun.

Word	Noun	Adjective	Verb	Adverb
anatomy	Yes	No	No	No
azygos	No	Yes	No	No

anatomy (noun)	azygos (noun)
a detailed analysis
alternative names for the body of a human being
the branch of morphology that deals with the structure of animals

anatomy (adjective)	azygos (adjective)
	occurring singly; not one of a pair