ham actor vs thespian

ham actor and thespian both are nouns.

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

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

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

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

ham actor (adjective)	thespian (adjective)
	of or relating to drama