ham actor vs histrion

ham actor and histrion both are nouns.

Word	Noun	Adjective	Verb	Adverb
ham actor	Yes	No	No	No
histrion	Yes	No	No	No

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

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

ham actor (noun)	histrion (noun)
an unskilled actor who overacts	a theatrical performer