social dancer vs actor

social dancer and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
social dancer	Yes	No	No	No
actor	Yes	No	No	No

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

social dancer: a person who participates in a social gathering arranged for dancing (as a ball)
actor: a person who acts and gets things done

Other hypernyms of social dancer include doer, worker.

social dancer (noun)	actor (noun)
a person who participates in a social gathering arranged for dancing (as a ball)	a theatrical performer
	a person who acts and gets things done