exhibition vs assemblage

exhibition and assemblage both are nouns.

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

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

exhibition: a collection of things (goods or works of art etc.) for public display
assemblage: several things grouped together or considered as a whole

Other hypernyms of exhibition include accumulation, aggregation, collection.

exhibition (noun)	assemblage (noun)
the act of exhibiting	the social act of assembling
a collection of things (goods or works of art etc.) for public display	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