coin collection vs aggregation

coin collection and aggregation both are nouns.

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

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

coin collection: the collection and study of money (and coins in particular)
aggregation: the act of gathering something together

Other hypernyms of coin collection include assembling, collecting, collection.

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

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

coin collection (noun)	aggregation (noun)
the collection and study of money (and coins in particular)	the act of gathering something together
a collection of coins	several things grouped together or considered as a whole