fauna vs aggregation

fauna and aggregation both are nouns.

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

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

Other hypernyms of fauna include accumulation, assemblage, collection.

fauna (noun)	aggregation (noun)
a living organism characterized by voluntary movement	the act of gathering something together
all the animal life in a particular region or period	several things grouped together or considered as a whole