idiosyncratic (adj.)

• abnormal
• anomalous
• appropriate
• characteristic
• connotative
• contrastive
• crank
• cranky
• crotchety
• demonstrative
• denotative
• designative
• deviant
• diacritical
• diagnostic
• different
• differential
• discriminating
• discriminative
• distinctive
• distinguished
• divergent
• dotty
• eccentric
• emblematic
• erratic
• evidential
• exceptional
• expressive
• fey
• figural
• figurative
• flaky
• freakish
• funny
• ideographic
• implicative
• indicative
• indicatory
• individual
• intrinsic
• irregular
• kinky
• kooky
• maggoty
• marked
• meaningful
• metaphorical
• naming
• nutty
• odd
• peculiar
• personal
• private
• proper
• queer
• quintessential
• quirky
• representative
• screwball
• screwy
• semantic
• semiotic
• separative
• significant
• significative
• single
• singular
• strange
• suggestive
• symbolic
• symptomatic
• twisted
• typical
• unconventional
• unique
• unnatural
• wacky
• whimsical