aviation vs accumulation

aviation and accumulation both are nouns.

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

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

Other hypernyms of aviation include aggregation, assemblage, collection.

aviation (noun)	accumulation (noun)
travel via aircraft	the act of accumulating
the art of operating aircraft	several things grouped together or considered as a whole
the aggregation of a country's military aircraft	(finance) profits that are not paid out as dividends but are added to the capital base of the corporation
the operation of aircraft to provide transportation	an increase by natural growth or addition