general anatomy vs outer

general anatomy is a noun but outer is not a noun.

Word	Noun	Adjective	Verb	Adverb
general anatomy	Yes	No	No	No
outer	No	Yes	No	No

general anatomy (noun)	outer (noun)
the branch of morphology that deals with the structure of animals

general anatomy (adjective)	outer (adjective)
	being on the outside or further from a center
	being on or toward the outside of the body
	located outside