play-actor vs histrion

play-actor and histrion both are nouns.

Word	Noun	Adjective	Verb	Adverb
play-actor	Yes	No	No	No
histrion	Yes	No	No	No

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

Other hypernyms of play-actor include actor, player, role player, thespian.

play-actor (noun)	histrion (noun)
an actor who travels around the country presenting plays	a theatrical performer