4
off-the-wall(adjective, strange, fantasy, unreal)
4
symptomatic(adjective, individual, specific, typical, distinctive)
4
unfamiliar(adjective, odd, bizarre, outlandish, nonconforming)
3
capricious(adjective, extraordinary, unusual, wild, strange)
3
crazy(adjective, extraordinary, unusual, wild, strange)
3
fey(adjective, nonconforming)
3
foreign(adjective, strange, fantasy, unreal)
3
indicative(adjective, individual, specific, typical, distinctive)
3
novel(adjective, nonconforming)
3
precise(adjective, special)
3
rare(adjective, odd, bizarre, outlandish)
3
remarkable(adjective, unusual, strange, new, exceptional)
3
screwball(adjective, slang, usual)
3
screwy
3
single(separate, cool, unusual, strange, special)
3
specialized(adjective, special)
3
surreal(adjective, quality, strange, fantasy, unreal)
3
uncustomary(adjective, unusual, strange, odd, unique)
3
unexpected(adjective, unusual, strange, odd, bizarre)
3
unprecedented(adjective, exceptional, original)
10 years ago|16k views|share |citing 
APASmart Define. (2016). idiosyncratic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/idiosyncratic/thesaurus/synonyms
ChicagoSmart Define. 2016. "idiosyncratic thesaurus" https://smartdefine.org/idiosyncratic/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, idiosyncratic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/idiosyncratic/thesaurus/synonyms>.
MLASmart Define. "idiosyncratic thesaurus" 30 March 2016. Web. 22 September 2026. <https://smartdefine.org/idiosyncratic/thesaurus/synonyms>