noun
a loud, aggressive, or indignant noise or commotion
verb
to speak or behave in a noisy, aggressive, or indignant manner
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The politician's bluster did little to convince the public of his sincerity.
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Don't pay attention to his bluster, he's all talk and no action.
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He's just full of hot air, all that bluster and no substance.
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The storm's bluster was a powerful reminder of nature's force.