homoiotherm vs fauna

homoiotherm and fauna both are nouns.

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

As nouns, fauna is a hypernym of homoiotherm; that is, fauna is a word with a broader meaning than homoiotherm:

homoiotherm: an animal that has a body temperature that is relatively constant and independent of the environmental temperature
fauna: a living organism characterized by voluntary movement

Other hypernyms of homoiotherm include animal, animate being, beast, brute, creature.

homoiotherm (noun)	fauna (noun)
an animal that has a body temperature that is relatively constant and independent of the environmental temperature	a living organism characterized by voluntary movement
	all the animal life in a particular region or period