Ostentatious is when you show off. Here are some sentences.
It could be opulence or ostentation.
Ostentation (an excessively showy exhibition) can have these synonyms based on the context : pretentiousness, gaudiness, pomp, affectation, or garishness.
frippery = ostentation
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a group of animals
A flock of peacocks and peahens is called a Party.
pretension, affectation
(ostentatious: intended to attract notice and impress others, or a display that is tawdry or vulgar)"At Mardi Gras, the streets of the French Quarter are filled with revelers in ostentatious costumes.""He considered society functions to be an ostentatious display of wealth."
pomp, pomposity, splendor
"Article of ostentation" typically refers to a luxurious or showy item used to display wealth or status. It can be an extravagant piece of clothing, jewelry, or accessory that is meant to impress or attract attention. The term is often used in a critical or judgmental context to describe items that are considered excessive or unnecessary for practical purposes.
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a sentence with the word variety