social dancer vs dancer

social dancer and dancer both are nouns.

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

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

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

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