collecting vs aggregation

collecting and aggregation both are nouns.

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

As nouns, collecting and aggregation are synonyms defined as:

Other synonyms of collecting include assembling, collection.

collecting (noun)	aggregation (noun)
the act of gathering something together	the act of gathering something together
	several things grouped together or considered as a whole