hit parade vs aggregation

hit parade and aggregation both are nouns.

Word	Noun	Adjective	Verb	Adverb
hit parade	Yes	No	No	No
aggregation	Yes	No	No	No

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

hit parade: a collection of the best or most popular people or items of a given kind
aggregation: several things grouped together or considered as a whole

Other hypernyms of hit parade include accumulation, assemblage, collection.

hit parade (noun)	aggregation (noun)
a ranked list of the songs that are most popular at a given time	the act of gathering something together
a collection of the best or most popular people or items of a given kind	several things grouped together or considered as a whole