118 entries under crazy topic. ×

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bananas(mad, off)
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bigot(noun, loony)
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cockamamie(adjective, silly, foolish, mad)
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dement(noun, character, loony, dissentient)
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enthusiastic(adjective, keen, warm, silly, foolish)
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fiend(noun, loony)
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gung ho(expression, adjective, keen, warm, silly)
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hare-brained(adjective, silly, foolish, zany)
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harebrain(noun, loony)
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keen(adjective, warm, silly, foolish)
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madcap(adjective, silly, zany, wacky)
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not right(expression, cuckoo, queer)
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nut case(expression, character, loony, dissentient)
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obsessed(cuckoo, queer)
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overenthusiastic person(noun, expression, loony)
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wacko(character, lunatic, loony, dissentient)
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warm(adjective, keen, silly, foolish)
-1
zealous(adjective, keen, warm, silly, foolish)
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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>