universe vs assemblage

universe and assemblage both are nouns.

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

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

universe: (statistics) the entire aggregation of items from which samples can be drawn
assemblage: several things grouped together or considered as a whole

Other hypernyms of universe include accumulation, aggregation, collection.

universe (noun)	assemblage (noun)
everything stated or assumed in a given discussion	the social act of assembling
(statistics) the entire aggregation of items from which samples can be drawn	a system of components assembled together for a particular purpose
everything that exists anywhere	a group of persons together in one place
	several things grouped together or considered as a whole