accumulation vs increase

accumulation and increase both are nouns.

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

As nouns, increase is a hypernym of accumulation; that is, increase is a word with a broader meaning than accumulation:

Other hypernyms of accumulation include step-up.

As nouns, increase is a hypernym of accumulation; that is, increase is a word with a broader meaning than accumulation:

accumulation: an increase by natural growth or addition
increase: a process of becoming larger or longer or more numerous or more important

Other hypernyms of accumulation include growth, increment.

accumulation (noun)	increase (noun)
the act of accumulating	the act of increasing something
several things grouped together or considered as a whole	the amount by which something increases
(finance) profits that are not paid out as dividends but are added to the capital base of the corporation	a change resulting in an increase
an increase by natural growth or addition	a process of becoming larger or longer or more numerous or more important
	a quantity that is added

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