The noun opulence means the quality of being expensive and luxurious.

 Synonyms are wealthabundanceaffluence, or fortune.

The word origins from Middle French (16th century) opulence, and Latin opulentia, from opulentus meaning “wealthy”, a dissimilation of *op-en-ent-, which is related to ops meaning “wealth, power, ability, resources” and to opus meaning “work, labor, exertion”.

Living in such opulence makes her uneasy.

They stared in awe at the pompous display of his opulence.

The opulence of the mansion was a contrast to its surrounding neighborhood.