variety vs aggregation

variety and aggregation both are nouns.

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

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

Other hypernyms of variety include accumulation, assemblage, collection.

variety (noun)	aggregation (noun)
noticeable heterogeneity	the act of gathering something together
a difference that is usually pleasant	several things grouped together or considered as a whole
a category of things distinguished by some common characteristic or quality
a show consisting of a series of short unrelated performances
(biology) a taxonomic category consisting of members of a species that differ from others of the same species in minor but heritable characteristics
a collection containing a variety of sorts of things