collection vs publication

collection and publication both are nouns.

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

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

collection (noun)	publication (noun)
the act of gathering something together	the business of issuing printed matter for sale or distribution
a publication containing a variety of works	the act of issuing printed materials
request for a sum of money	the communication of something to the public; making information generally known
several things grouped together or considered as a whole	a copy of a printed work offered for distribution