treasure trove vs accumulation

treasure trove and accumulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
treasure trove	Yes	No	No	No
accumulation	Yes	No	No	No

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

Other hypernyms of treasure trove include aggregation, assemblage, collection.

treasure trove (noun)	accumulation (noun)
any collection of valuables that is discovered	the act of accumulating
treasure of unknown ownership found hidden (usually in the earth)	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