convoy vs accumulation

convoy and accumulation both are nouns.

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

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

Other hypernyms of convoy include aggregation, assemblage, collection.

convoy (noun)	accumulation (noun)
the act of escorting while in transit	the act of accumulating
a procession of land vehicles traveling together	several things grouped together or considered as a whole
a collection of merchant ships with an escort of warships	(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

convoy (verb)	accumulation (verb)
escort in transit