southpaw vs actor

southpaw and actor both are nouns.

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

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

Other hypernyms of southpaw include doer, worker.

southpaw (noun)	actor (noun)
a person who uses the left hand with greater skill than the right	a theatrical performer
a baseball pitcher who throws the ball with the left hand	a person who acts and gets things done