When it comes to describing experiences of supreme comfort and indulgence, there are several synonyms to the phrase "extraordinary luxury". One can use words such as opulent, lavish, extravagant, sumptuous, plush, or upscale to paint a picture of lavishness. The word "lavish" represents generosity and abundance, while "opulent" suggests a grand scale and richness. "Extravagant" denotes the excessive display of luxury, while "sumptuous" means rich with superior quality and taste. "Plush" indicates an inviting and comfortable setting, and "upscale" signifies posh and exclusive. These words convey an elevated level of luxury that guarantees a memorable and unforgettable experience.