| flounce | (verb) walk emphatically | - |
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| flounder | (verb) walk with great difficulty | Synonyms: stagger |
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| (verb) behave awkwardly; have difficulties | - |
| flour | (verb) convert grain into flour | - |
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| (verb) cover with flour | - |
| flourish | (verb) grow vigorously | Synonyms: boom, expand, thrive |
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| (verb) move or swing back and forth | Synonyms: brandish, wave |
| (verb) make steady progress; be at the high point in one's career or reach a high point in historical significance or importance | Synonyms: fly high, prosper, thrive |
| flout | (verb) laugh at with contempt and derision | Synonyms: barrack, gibe, jeer, scoff |
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| (verb) treat with contemptuous disregard | Synonyms: scoff |