pressman vs skilled workman

pressman and skilled workman both are nouns.

Word	Noun	Adjective	Verb	Adverb
pressman	Yes	No	No	No
skilled workman	Yes	No	No	No

As nouns, skilled workman is a hypernym of pressman; that is, skilled workman is a word with a broader meaning than pressman:

Other hypernyms of pressman include skilled worker, trained worker.

pressman (noun)	skilled workman (noun)
someone whose occupation is printing	a worker who has acquired special skills
a male journalist employed to provide news stories for newspapers or broadcast media