exotic dancer vs dancer

exotic dancer and dancer both are nouns.

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

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

Other hypernyms of exotic dancer include professional dancer, terpsichorean.

exotic dancer (noun)	dancer (noun)
a woman who performs a solo belly dance	a performer who dances professionally
a performer who provides erotic entertainment by undressing to music	a person who participates in a social gathering arranged for dancing (as a ball)