testator vs actor

testator and actor both are nouns.

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

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

Other hypernyms of testator include doer, worker.

testator (noun)	actor (noun)
a person who makes a will	a theatrical performer
	a person who acts and gets things done