bottle collection vs assemblage

bottle collection and assemblage both are nouns.

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

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

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

bottle collection (noun)	assemblage (noun)
the activity of collecting bottles	the social act of assembling
collecting bottles for reuse	a system of components assembled together for a particular purpose
a collection of bottles	a group of persons together in one place
	several things grouped together or considered as a whole