long suit vs aggregation

long suit and aggregation both are nouns.

Word	Noun	Adjective	Verb	Adverb
long suit	Yes	No	No	No
aggregation	Yes	No	No	No

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

Other hypernyms of long suit include accumulation, assemblage, collection.

long suit (noun)	aggregation (noun)
an asset of special worth or utility	the act of gathering something together
in a hand, the suit having the most cards	several things grouped together or considered as a whole