audio library vs aggregation

audio library and aggregation both are nouns.

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

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

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

audio library (noun)	aggregation (noun)
an audio library is a collection of sound recordings.	the act of gathering something together
	several things grouped together or considered as a whole