fauna vs assemblage

fauna and assemblage both are nouns.

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

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

Other hypernyms of fauna include accumulation, aggregation, collection.

fauna (noun)	assemblage (noun)
a living organism characterized by voluntary movement	the social act of assembling
all the animal life in a particular region or period	a system of components assembled together for a particular purpose
	a group of persons together in one place
	several things grouped together or considered as a whole