fisher vs trained worker

fisher and trained worker both are nouns.

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

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

Other hypernyms of fisher include skilled worker, skilled workman.

fisher (noun)	trained worker (noun)
large dark brown North American arboreal carnivorous mammal	a worker who has acquired special skills
someone whose occupation is catching fish