topknotted vs fauna

topknotted is not a noun while fauna is a noun.

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

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

topknotted (adjective)	fauna (adjective)
(of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination