collage vs assemblage

collage and assemblage both are nouns.

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

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

Other hypernyms of collage include accumulation, aggregation, collection.

collage (noun)	assemblage (noun)
a paste-up made by sticking together pieces of paper or photographs to form an artistic image	the social act of assembling
any collection of diverse things	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