bailaor: flamenco dancer
bailador:someone who dances or someone who dances popular music from Spain, specially from Andalucia
bailarín: someone who dances and a professional dancer
You can find these 3 words in the dictionary ( www.rae.es)
Ah! I forgot: andalusian people eat the letters when they speak so I can say that 'bailaor' and ' bailador' is the same:
Eg: ¿Te has ido ya?” =“¿Tas ío ya?“? Lo mismo con tó (todo), ná (nada), pá (para),,pescao (pescado)
Hope it makes sense