newspaper vs newspaper publisher

newspaper and newspaper publisher both are nouns.

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

As nouns, newspaper and newspaper publisher are synonyms defined as:

newspaper and newspaper publisher: a business firm that publishes newspapers

Other synonyms of newspaper include paper.

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