accumulate vs accumulation

accumulate is not a noun while accumulation is a noun.

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

accumulate (noun)	accumulation (noun)
	the act of accumulating
	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

accumulate (verb)	accumulation (verb)
increase in amount by collecting or gathering
get or gather together