mythology vs aggregation

mythology and aggregation both are nouns.

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

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

mythology: myths collectively; the body of stories associated with a culture or institution or person
aggregation: several things grouped together or considered as a whole

Other hypernyms of mythology include accumulation, assemblage, collection.

mythology (noun)	aggregation (noun)
the study of myths	the act of gathering something together
myths collectively; the body of stories associated with a culture or institution or person	several things grouped together or considered as a whole