audio library vs accumulation

audio library and accumulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
audio library	Yes	No	No	No
accumulation	Yes	No	No	No

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

Other hypernyms of audio library include aggregation, assemblage, collection.

audio library (noun)	accumulation (noun)
an audio library is a collection of sound recordings.	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