diet vs fauna

diet and fauna both are nouns.

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

diet (noun)	fauna (noun)
the act of restricting your food intake (or your intake of particular foods)	a living organism characterized by voluntary movement
a prescribed selection of foods	all the animal life in a particular region or period
the usual food and drink consumed by an organism (person or animal)
a legislative assembly in certain countries (e.g., Japan)

diet (verb)	fauna (verb)
eat sparingly, for health reasons or to lose weight
follow a regimen or a diet, as for health reasons