magazine vs publishing firm

magazine and publishing firm both are nouns.

Word	Noun	Adjective	Verb	Adverb
magazine	Yes	No	No	No
publishing firm	Yes	No	No	No

As nouns, publishing firm is a hypernym of magazine; that is, publishing firm is a word with a broader meaning than magazine:

Other hypernyms of magazine include publisher, publishing company, publishing house.

magazine (noun)	publishing firm (noun)
a storehouse (as a compartment on a warship) where weapons and ammunition are stored	a firm in the publishing business
product consisting of a paperback periodic publication as a physical object
a metal frame or container holding cartridges; can be inserted into an automatic gun
a light-tight supply chamber holding the film and supplying it for exposure as required
a periodic publication containing pictures and stories and articles of interest to those who purchase it or subscribe to it
a business firm that publishes magazines