exhibition vs aggregation

exhibition and aggregation both are nouns.

Word	Noun	Adjective	Verb	Adverb
exhibition	Yes	No	No	No
aggregation	Yes	No	No	No

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

exhibition: a collection of things (goods or works of art etc.) for public display
aggregation: several things grouped together or considered as a whole

Other hypernyms of exhibition include accumulation, assemblage, collection.

exhibition (noun)	aggregation (noun)
the act of exhibiting	the act of gathering something together
a collection of things (goods or works of art etc.) for public display	several things grouped together or considered as a whole