general anatomy vs buccal

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

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

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

general anatomy (adjective)	buccal (adjective)
	of or involving the mouth or mouth region or the surface on which the mouth is located
	of or relating to or toward the cheek