preserver vs actor

preserver and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
preserver	Yes	No	No	No
actor	Yes	No	No	No

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

Other hypernyms of preserver include doer, worker.

preserver (noun)	actor (noun)
rescue equipment consisting of a buoyant belt or jacket to keep a person from drowning	a theatrical performer
a skilled worker who is employed to restore or refinish buildings or antique furniture	a person who acts and gets things done
someone who keeps safe from harm or danger
a cook who preserves fruits or meat