From ultra- + luxury.
ultraluxury (not comparable)
- Providing an extremely high degree of luxury, well beyond what "luxury" would normally imply
2009 February 26, Shyama Patel, “One Piece or Two?”, in New York Times[1]:Post-tsunami, the glitz factor has soared, with new ultraluxury resorts and a more upscale vibe in town.
