101 entries under quirk topic. ×

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extraordinariness(characteristic, deviation, irregularity, peculiarity)
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fixation(complex, hang-up)
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hysteria(complex, hang-up)
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insanity(complex, hang-up)
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instability(complex, hang-up)
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madness(complex, hang-up)
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maladjustment(complex, hang-up)
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mental disturbance(expression, complex, hang-up)
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mental illness(expression, complex, hang-up)
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neurasthenia(complex, hang-up)
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neurosis(complex, hang-up)
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obsession(complex, hang-up)
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odd trait(expression, trait, individuality, eccentricity)
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personality disorder(expression, complex, hang-up)
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phenomenon(characteristic, irregularity, peculiarity, incongruity)
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phobia(complex, hang-up)
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problem(complex, hang-up)
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psychological disorder(expression, complex, hang-up)
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psychopathy(complex, hang-up)
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schtick(trait, individuality, eccentricity, particularity)
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APASmart Define. (2016). idiosyncrasy thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/idiosyncrasy/thesaurus/synonyms
ChicagoSmart Define. 2016. "idiosyncrasy thesaurus" https://smartdefine.org/idiosyncrasy/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, idiosyncrasy thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/idiosyncrasy/thesaurus/synonyms>.
MLASmart Define. "idiosyncrasy thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/idiosyncrasy/thesaurus/synonyms>