refiner vs trained worker

refiner and trained worker both are nouns.

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

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

Other hypernyms of refiner include skilled worker, skilled workman.

refiner (noun)	trained worker (noun)
one whose work is to refine a specific thing	a worker who has acquired special skills