sailor vs trained worker

sailor and trained worker both are nouns.

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

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

Other hypernyms of sailor include skilled worker, skilled workman.

sailor (noun)	trained worker (noun)
a stiff hat made of straw with a flat crown	a worker who has acquired special skills
any member of a ship's crew
a serviceman in the navy