upstager vs histrion

upstager and histrion both are nouns.

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

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

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

upstager (noun)	histrion (noun)
a selfish actor who upstages the other actors	a theatrical performer