What is the best synonym for 'extravagance'?

The term 'extravagance' refers to excessive or unnecessary spending, often characterized by luxury and lavishness. The best synonym, 'opulency,' aligns with this definition, as it describes a state of great wealth or sumptuousness, suggesting lavish spending and luxury that goes beyond what is essential or practical.

In contrast, the other terms reflect a more restrained or frugal approach. 'Economy' implies thriftiness and careful management of resources, which is the opposite of extravagance. 'Modesty' denotes simplicity and humility, often avoiding display or excess. 'Conservatism' generally relates to cautiousness and a preference for tradition, which also does not convey the sense of lavishness associated with 'extravagance.' Therefore, 'opulency' is the most accurate synonym, emphasizing the idea of luxury and abundance that characterizes extravagance.