forger vs metalworker

forger and metalworker both are nouns.

Word	Noun	Adjective	Verb	Adverb
forger	Yes	No	No	No
metalworker	Yes	No	No	No

As nouns, metalworker is a hypernym of forger; that is, metalworker is a word with a broader meaning than forger:

forger: someone who operates a forge
metalworker: someone who works metal (especially by hammering it when it is hot and malleable)

Other hypernyms of forger include smith.

forger (noun)	metalworker (noun)
someone who operates a forge	someone who works metal (especially by hammering it when it is hot and malleable)
someone who makes copies illegally