lens maker vs trained worker

lens maker and trained worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
lens maker	Yes	No	No	No
trained worker	Yes	No	No	No

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

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

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