Twin vs actor

Twin and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
Twin	Yes	No	No	No
actor	Yes	No	No	No

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

Other hypernyms of Twin include doer, worker.

Twin (noun)	actor (noun)
a waterfall in the Snake River in southern Idaho	a theatrical performer
(astrology) a person who is born while the sun is in Gemini	a person who acts and gets things done