preserver vs skilled worker

preserver and skilled worker both are nouns.

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

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

preserver: a skilled worker who is employed to restore or refinish buildings or antique furniture
skilled worker: a worker who has acquired special skills

Other hypernyms of preserver include skilled workman, trained worker.

preserver (noun)	skilled worker (noun)
rescue equipment consisting of a buoyant belt or jacket to keep a person from drowning	a worker who has acquired special skills
a skilled worker who is employed to restore or refinish buildings or antique furniture
someone who keeps safe from harm or danger
a cook who preserves fruits or meat