impression vs publication

impression and publication both are nouns.

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

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

impression (noun)	publication (noun)
an impressionistic portrayal of a person	the business of issuing printed matter for sale or distribution
the act of pressing one thing on or into the surface of another	the act of issuing printed materials
(dentistry) an imprint of the teeth and gums in wax or plaster	the communication of something to the public; making information generally known
an outward appearance	a copy of a printed work offered for distribution
a vague idea in which some confidence is placed
a clear and telling mental image
a symbol that is the result of printing or engraving
all the copies of a work printed at one time
a concavity in a surface produced by pressing