- aberration
- anamorphism
- aroma
- attribute
- badge
- brand
- cachet
- caprice
- cast
- character
- characteristic
- command of language
- conceit
- configuration
- crank
- crotchet
- cut
- deviation
- differentia
- differential
- differentness
- distinctive feature
- earmark
- eccentricity
- erraticness
- feature
- figure
- flavor
- form of speech
- grotesqueness
- gust
- habit
- hallmark
- idiocrasy
- idiosyncrasy
- impress
- impression
- index
- individualism
- irregularity
- keynote
- kink
- lineaments
- maggot
- mannerism
- mark
- marking
- minauderie
- mold
- monstrousness
- nature
- oddity
- odor
- particularity
- peculiarity
- peculiar trait
- property
- quality
- quip
- quirk
- savor
- seal
- shape
- sigil
- signal
- singularity
- smack
- specialty
- stamp
- stereotype
- strangeness
- symptom
- taint
- tang
- taste
- token
- trademark
- trait
- trick
- trick of behavior
- twist
- whim
- whimsy