racer vs fauna

racer and fauna both are nouns.

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

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

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

racer (noun)	fauna (noun)
an animal that races	a living organism characterized by voluntary movement
slender fast-moving North American snakes	all the animal life in a particular region or period
a fast car that competes in races
someone who drives racing cars at high speeds