fauna vs animal

fauna and animal both are nouns.

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

As nouns, fauna and animal are synonyms defined as:

Other synonyms of fauna include animate being, beast, brute, creature.

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

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