Synonyms for Spa (same or very similar meaning)
WordNet sense 1 (a health resort near a spring or at the seaside):
watering place, watering holeWordNet sense 2 (a fashionable hotel usually in a resort area):
resort hotelWordNet sense 3 (a place of business with equipment and facilities for exercising and improving physical fitness):
health spa, health clubFrom the ODE community, based on WordNetadd/edit