assortment vs accumulation

assortment and accumulation both are nouns.

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

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

Other hypernyms of assortment include aggregation, assemblage, collection.

assortment (noun)	accumulation (noun)
the act of distributing things into classes or categories of the same type	the act of accumulating
a collection containing a variety of sorts of things	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