rivetter vs skilled workman

rivetter and skilled workman both are nouns.

Word	Noun	Adjective	Verb	Adverb
rivetter	Yes	No	No	No
skilled workman	Yes	No	No	No

As nouns, skilled workman is a hypernym of rivetter; that is, skilled workman is a word with a broader meaning than rivetter:

Other hypernyms of rivetter include skilled worker, trained worker.

rivetter (noun)	skilled workman (noun)
a machine for driving rivets	a worker who has acquired special skills
a worker who inserts and hammers rivets