epizootic vs fauna

epizootic is not a noun while fauna is a noun.

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

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

epizootic (adjective)	fauna (adjective)
(of animals) epidemic among animals of a single kind within a particular region