dancer vs social dancer

dancer and social dancer both are nouns.

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

As nouns, dancer and social dancer are synonyms defined as:

dancer and social dancer: a person who participates in a social gathering arranged for dancing (as a ball)

dancer (noun)	social dancer (noun)
a performer who dances professionally	a person who participates in a social gathering arranged for dancing (as a ball)
a person who participates in a social gathering arranged for dancing (as a ball)