preserver vs skilled workman

preserver and skilled workman both are nouns.

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

As nouns, skilled workman is a hypernym of preserver; that is, skilled workman 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 workman: a worker who has acquired special skills

Other hypernyms of preserver include skilled worker, trained worker.

preserver (noun)	skilled workman (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