105 entries under silly topic. ×

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acting crazy(expression, adjective, foolish, crazy)
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ape(foolish, unwise)
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bats in the belfry(expression, idiom, foolish, unwise)
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berserk(foolish, unwise)
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cockamamie(adjective, foolish, crazy, mad)
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delirious(foolish, unwise)
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dingy(foolish, unwise)
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enthusiastic(adjective, keen, warm, foolish)
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flipped(foolish, unwise)
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flipped out(expression, foolish, unwise)
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gung ho(expression, adjective, keen, warm)
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hare-brained(adjective, foolish, crazy, zany)
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keen(adjective, warm, foolish, crazy)
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mad as a March hare(expression, idiom, foolish, unwise)
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madcap(adjective, crazy, zany, wacky)
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mentally strange(expression, foolish, unwise)
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moonstruck(foolish, unwise)
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screw loose(expression, foolish, unwise)
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unglued(foolish, unstable, disturbed, unwise)
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unsound(foolish, unstable, disturbed, unhinged)
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APASmart Define. (2016). eccentric thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/eccentric/thesaurus/synonyms
ChicagoSmart Define. 2016. "eccentric thesaurus" https://smartdefine.org/eccentric/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, eccentric thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/eccentric/thesaurus/synonyms>.
MLASmart Define. "eccentric thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/eccentric/thesaurus/synonyms>