coin collection vs assemblage

coin collection and assemblage both are nouns.

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

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

Other hypernyms of coin collection include accumulation, aggregation, collection.

coin collection (noun)	assemblage (noun)
the collection and study of money (and coins in particular)	the social act of assembling
a collection of coins	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