battler vs actor

battler and actor both are nouns.

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

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

Other hypernyms of battler include doer, worker.

battler (noun)	actor (noun)
someone who fights (or is fighting)	a theatrical performer
	a person who acts and gets things done