captive vs fauna

captive and fauna both are nouns.

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

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

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

captive (noun)	fauna (noun)
an animal that is confined	a living organism characterized by voluntary movement
a person who is confined; especially a prisoner of war	all the animal life in a particular region or period
a person held in the grip of a strong emotion or passion

captive (adjective)	fauna (adjective)
giving or marked by complete attention to
being in captivity