publisher vs press lord

publisher and press lord both are nouns.

Word	Noun	Adjective	Verb	Adverb
publisher	Yes	No	No	No
press lord	Yes	No	No	No

As nouns, press lord is a hyponym of publisher; that is, press lord is a word with a more specific, narrower meaning than publisher:

publisher (noun)	press lord (noun)
a firm in the publishing business	a powerful newspaper proprietor
a person engaged in publishing periodicals or books or music
the proprietor of a newspaper