riveter vs trained worker

riveter and trained worker both are nouns.

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

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

Other hypernyms of riveter include skilled worker, skilled workman.

riveter (noun)	trained worker (noun)
a machine for driving rivets	a worker who has acquired special skills
a worker who inserts and hammers rivets