histrion vs ingenue

histrion and ingenue both are nouns.

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

As nouns, ingenue is a hyponym of histrion; that is, ingenue is a word with a more specific, narrower meaning than histrion:

histrion: a theatrical performer
ingenue: an actress who specializes in playing the role of an artless innocent young girl

histrion (noun)	ingenue (noun)
a theatrical performer	the role of an innocent artless young woman in a play
	an artless innocent young girl (especially as portrayed on the stage)
	an actress who specializes in playing the role of an artless innocent young girl