increase vs accrual

increase and accrual both are nouns.

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

As nouns, accrual is a hyponym of increase; that is, accrual is a word with a more specific, narrower meaning than increase:

increase (noun)	accrual (noun)
the act of increasing something	the act of accumulating
the amount by which something increases
a change resulting in an increase
a process of becoming larger or longer or more numerous or more important
a quantity that is added

increase (verb)	accrual (verb)
become bigger or greater in amount
make bigger or more