Extravagancy
Part of speech: noun
Definition: The characteristic of being extravagant. A thing that is extravagant.
Extravagance
Part of speech: noun
Definition: excessive or superfluous expenditure of moneyprodigality as in extravagance of anger, love, expression, imagination, or demands.
Example sentence: One should live between extravagance and meanness. Don't save money by starving your mind. It is false economy never to take a holiday, or never to spend money for an evening's amusement or for a useful book.