lens maker vs skilled workman

lens maker and skilled workman both are nouns.

Word	Noun	Adjective	Verb	Adverb
lens maker	Yes	No	No	No
skilled workman	Yes	No	No	No

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

Other hypernyms of lens maker include skilled worker, trained worker.

lens maker (noun)	skilled workman (noun)
a worker who makes glasses for remedying defects of vision	a worker who has acquired special skills