80 entries under silly topic. ×

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derisory(foolish, unwise, preposterous, ludicrous)
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dingy(foolish, unwise)
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dippy(foolish, unwise)
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flipped(foolish, unwise)
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flipped out(expression, foolish, unwise)
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foolhardy(foolish, unwise)
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fruity(foolish, unwise)
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goofy(foolish, unwise, preposterous, ludicrous)
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half-baked(foolish, unwise)
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ill-conceived(foolish, unwise)
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impracticable(foolish, unwise)
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imprudent(foolish, unwise)
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irresponsible(foolish, unwise)
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lunatic(foolish, unwise)
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mad as a March hare(expression, idiom, foolish, unwise)
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mad as a hatter(expression, idiom, foolish, unwise)
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maniacal(foolish, unwise)
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mental(foolish, unwise)
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mentally strange(expression, foolish, unwise)
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moonstruck(foolish, unwise)
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APASmart Define. (2016). outlandish thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/outlandish/thesaurus/synonyms
ChicagoSmart Define. 2016. "outlandish thesaurus" https://smartdefine.org/outlandish/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, outlandish thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/outlandish/thesaurus/synonyms>.
MLASmart Define. "outlandish thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/outlandish/thesaurus/synonyms>