jeweller vs gold-worker

jeweller and gold-worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
jeweller	Yes	No	No	No
gold-worker	Yes	No	No	No

As nouns, gold-worker is a hyponym of jeweller; that is, gold-worker is a word with a more specific, narrower meaning than jeweller:

Other hyponyms of jeweller include goldsmith, goldworker, silver-worker, silversmith, silverworker.

jeweller (noun)	gold-worker (noun)
someone in the business of selling jewelry	an artisan who makes jewelry and other objects out of gold
someone who makes jewelry