firstly, ostentation has to do with d pretentiousness display of a particular thing. Eg article,etc. Now article of ostentation could be defined as d extravagant consumption or extravagant usage of a particular commodity. One of d article of ostentation could be tagged as extravagant spending.
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Adults
president of india under the article 280 of the constitution
The article may include a reference to Ellis Gaming
Ostentatious is when you show off. Here are some sentences.That outfit is pure ostentation; go put on something more suitable!Ostentation is a sign of a vain person.I paid no attention to the ostentation around me, but listened carefully to what was actually said.
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
pomp, pomposity, splendor
It could be opulence or ostentation.
muster or ostentation
If you mean group name as in collective nouns, then muster, ostentation or pride
The collective nouns for peacock are a muster of peacocks or an ostentation of peacocks.