offspring vs fauna

offspring and fauna both are nouns.

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

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

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

offspring (noun)	fauna (noun)
any immature animal	a living organism characterized by voluntary movement
something that comes into existence as a result	all the animal life in a particular region or period
the immediate descendants of a person