collection vs assemblage

collection and assemblage both are nouns.

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

As nouns, collection and assemblage are synonyms defined as:

collection and assemblage: several things grouped together or considered as a whole

Other synonyms of collection include accumulation, aggregation.

collection (noun)	assemblage (noun)
the act of gathering something together	the social act of assembling
a publication containing a variety of works	a system of components assembled together for a particular purpose
request for a sum of money	a group of persons together in one place
several things grouped together or considered as a whole	several things grouped together or considered as a whole