defense team vs accumulation

defense team and accumulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
defense team	Yes	No	No	No
accumulation	Yes	No	No	No

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

Other hypernyms of defense team include aggregation, assemblage, collection.

defense team (noun)	accumulation (noun)
the defendant and his legal advisors collectively	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