accumulation vs accrual

accumulation and accrual both are nouns.

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

As nouns, accumulation and accrual are synonyms defined as:

Other synonyms of accumulation include accruement.

accumulation (noun)	accrual (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