newspaper vs publisher

newspaper and publisher both are nouns.

Word	Noun	Adjective	Verb	Adverb
newspaper	Yes	No	No	No
publisher	Yes	No	No	No

As nouns, publisher is a hypernym of newspaper; that is, publisher is a word with a broader meaning than newspaper:

Other hypernyms of newspaper include publishing company, publishing firm, publishing house.

newspaper (noun)	publisher (noun)
the physical object that is the product of a newspaper publisher	a firm in the publishing business
a daily or weekly publication on folded sheets; contains news and articles and advertisements	a person engaged in publishing periodicals or books or music
a business firm that publishes newspapers	the proprietor of a newspaper
cheap paper made from wood pulp and used for printing newspapers