packet vs accumulation

packet and accumulation both are nouns.

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

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

Other hypernyms of packet include aggregation, assemblage, collection.

packet (noun)	accumulation (noun)
a small package or bundle	the act of accumulating
a boat for carrying mail	several things grouped together or considered as a whole
(computer science) a message or message fragment	(finance) profits that are not paid out as dividends but are added to the capital base of the corporation
a collection of things wrapped or boxed together	an increase by natural growth or addition