animal vs gregarious

animal is a noun but gregarious is not a noun.

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

animal (noun)	gregarious (noun)
a living organism characterized by voluntary movement

animal (adjective)	gregarious (adjective)
marked by the appetites and passions of the body	(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