tax collection vs collection

tax collection and collection both are nouns.

Word	Noun	Adjective	Verb	Adverb
tax collection	Yes	No	No	No
collection	Yes	No	No	No

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

Other hypernyms of tax collection include aggregation, assembling, collecting.

tax collection (noun)	collection (noun)
the collection of taxes	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