accumulation vs accumulate

accumulation is a noun but accumulate is not a noun.

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

accumulation (noun)	accumulate (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

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