napoleoniana vs accumulation

napoleoniana and accumulation both are nouns.

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

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

napoleoniana: items related to the life of Napoleon (engravings, paintings, books, etc.).
accumulation: several things grouped together or considered as a whole

Other hypernyms of napoleoniana include aggregation, assemblage, collection.

napoleoniana (noun)	accumulation (noun)
items related to the life of Napoleon (engravings, paintings, books, etc.).	the act of accumulating
	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