50
quality(noun, nature, feature, characteristic, style)
40
peculiarity(noun, nature, feature, characteristic, change)
31
quirk(noun, feature, characteristic, quality, character)
26
characteristic(noun, feature, state, change, quality)
20
trait(noun, nature, feature, state, characteristic)
19
eccentricity(noun, characteristic, weakness, twist, fault)
17
mannerism(noun, nature, feature, characteristic, quality)
17
oddity(noun, characteristic, quality, character, weakness)
15
feature(noun, state, characteristic, quality, character)
14
singularity(noun, nature, feature, characteristic, change)
12
foible(noun, weakness, twist, fault, trait)
12
property(noun, nature, feature, characteristic, quality)
11
crotchet(noun, chance, surprise, slant, variation)
10
mark(noun, nature, feature, characteristic, quality)
10
attribute(noun, nature, feature, characteristic, quality)
10
irregularity(noun, characteristic, change, chance, unconformity)
8
abnormality(noun, characteristic, complex, quirk, unconformity)
8
character(noun, nature, feature, characteristic, quality)
8
deviation(noun, characteristic, change, complex, difference)
7
aberration(noun, characteristic, change, complex, unconformity)
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APASmart Define. (2016). idiosyncrasy thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/idiosyncrasy/thesaurus/synonyms
ChicagoSmart Define. 2016. "idiosyncrasy thesaurus" https://smartdefine.org/idiosyncrasy/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, idiosyncrasy thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/idiosyncrasy/thesaurus/synonyms>.
MLASmart Define. "idiosyncrasy thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/idiosyncrasy/thesaurus/synonyms>