fauna vs creature

fauna and creature both are nouns.

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

As nouns, fauna and creature are synonyms defined as:

fauna and creature: a living organism characterized by voluntary movement

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

fauna (noun)	creature (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	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else