dyer vs trained worker

dyer and trained worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
dyer	Yes	No	No	No
trained worker	Yes	No	No	No

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

Other hypernyms of dyer include skilled worker, skilled workman.

dyer (noun)	trained worker (noun)
someone whose job is to dye cloth	a worker who has acquired special skills