comedian vs histrion

comedian and histrion both are nouns.

Word	Noun	Adjective	Verb	Adverb
comedian	Yes	No	No	No
histrion	Yes	No	No	No

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

Other hypernyms of comedian include actor, player, role player, thespian.

comedian (noun)	histrion (noun)
a professional performer who tells jokes and performs comical acts	a theatrical performer
an actor in a comedy