tragedian vs actor

tragedian and actor both are nouns.

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

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

Other hypernyms of tragedian include histrion, player, role player, thespian.

tragedian (noun)	actor (noun)
an actor who specializes in tragic roles	a theatrical performer
a writer (especially a playwright) who writes tragedies	a person who acts and gets things done