accrual vs accumulation

accrual and accumulation both are nouns.

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

As nouns, accrual and accumulation are synonyms defined as:

Other synonyms of accrual include accruement.

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