fauna vs gregarious

fauna is a noun but gregarious is not a noun.

Word	Noun	Adjective	Verb	Adverb
fauna	Yes	No	No	No
gregarious	No	Yes	No	No

fauna (noun)	gregarious (noun)
a living organism characterized by voluntary movement
all the animal life in a particular region or period

fauna (adjective)	gregarious (adjective)
	(of animals) tending to form a group with others of the same species
	(of plants) growing in groups that are close together
	instinctively or temperamentally seeking and enjoying the company of others