thirster vs actor

thirster and actor both are nouns.

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

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

Other hypernyms of thirster include doer, worker.

thirster (noun)	actor (noun)
a person with a strong desire for something	a theatrical performer
	a person who acts and gets things done