galvanizer vs trained worker

galvanizer and trained worker both are nouns.

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

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

Other hypernyms of galvanizer include skilled worker, skilled workman.

galvanizer (noun)	trained worker (noun)
a leader who stimulates and excites people to action	a worker who has acquired special skills
a skilled worker who coats iron or steel with zinc