aggregation vs accumulation

aggregation and accumulation both are nouns.

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

As nouns, aggregation and accumulation are synonyms defined as:

aggregation and accumulation: several things grouped together or considered as a whole

Other synonyms of aggregation include assemblage, collection.

aggregation (noun)	accumulation (noun)
the act of gathering something together	the act of accumulating
several things grouped together or considered as a whole	several things grouped together or considered as a whole
	(finance) profits that are not paid out as dividends but are added to the capital base of the corporation
	an increase by natural growth or addition