crewman vs skilled worker

crewman and skilled worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
crewman	Yes	No	No	No
skilled worker	Yes	No	No	No

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

Other hypernyms of crewman include skilled workman, trained worker.

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

Other hypernyms of crewman include skilled workman, trained worker.

crewman (noun)	skilled worker (noun)
a member of a work crew	a worker who has acquired special skills
a member of a flight crew
any member of a ship's crew