dancer vs exotic dancer

dancer and exotic dancer both are nouns.

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

As nouns, exotic dancer is a hyponym of dancer; that is, exotic dancer is a word with a more specific, narrower meaning than dancer:

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