smorgasbord vs accumulation

smorgasbord and accumulation both are nouns.

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

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

Other hypernyms of smorgasbord include aggregation, assemblage, collection.

smorgasbord (noun)	accumulation (noun)
an assortment of foods starting with herring or smoked eel or salmon etc with bread and butter; then cheeses and eggs and pickled vegetables and aspics; finally hot foods; served as a buffet meal	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