armourer vs skilled workman

armourer and skilled workman both are nouns.

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

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

Other hypernyms of armourer include skilled worker, trained worker.

armourer (noun)	skilled workman (noun)
a manufacturer of firearms	a worker who has acquired special skills
an enlisted man responsible for the upkeep of small arms and machine guns etc.
a worker skilled in making armor or arms