fumigator vs trained worker

fumigator and trained worker both are nouns.

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

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

Other hypernyms of fumigator include skilled worker, skilled workman.

fumigator (noun)	trained worker (noun)
a device that generates a gas for the purpose of disinfecting or eradicating pests	a worker who has acquired special skills
someone whose job is to fumigate