newspaper publisher vs owner

newspaper publisher and owner both are nouns.

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

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

Other hypernyms of newspaper publisher include proprietor.

newspaper publisher (noun)	owner (noun)
a business firm that publishes newspapers	(law) someone who owns (is legal possessor of) a business
the proprietor of a newspaper	a person who owns something