Extravagantness refers to the state of being excessive and wasteful, an indulgence in luxury and grandeur. Synonyms for this word include lavishness, opulence, sumptuousness, and extravagance. Extravagantness can also be replaced with splendor, excess, flamboyance, and showiness. These synonyms describe a grandiose and flamboyant display of wealth or indulgence that is often seen as excessive and unnecessary. Other synonyms for extravagantness include ostentation, flashiness, and flamboyant display, which all imply a showy and attention-grabbing nature. Ultimately, these synonyms all suggest a degree of indulgence or excess that goes beyond what is considered reasonable or necessary.