animal vs crested

animal is a noun but crested is not a noun.

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

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

animal (adjective)	crested (adjective)
marked by the appetites and passions of the body	(of a knight's helmet) having a decorative plume
	(of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination
	bearing an heraldic device