audio library vs collection

audio library and collection both are nouns.

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

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

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

audio library (noun)	collection (noun)
an audio library is a collection of sound recordings.	the act of gathering something together
	a publication containing a variety of works
	request for a sum of money
	several things grouped together or considered as a whole