The Oxford Thesaurus An A-Z Dictionary of Synonyms - eccentric adj.

1) unconventional, unusual, uncommon, idiosyncratic, anomalous, unorthodox, out of the ordinary, irregular, atypical, incongruous, errant, aberrant, exceptional, individual, singular, unique; abnormal, odd, peculiar, strange, curious, bizarre, outlandish, queer, quaint, quirky, weird, offbeat, Colloq far-out, kinky, cranky: Yes, I would agree that walking a canary is a bit eccentric. --n. 2) original, individualist, nonconformist, queer fellow, odd fish, Colloq character, card, freak, (nut) case, crank, oddball, weirdo or weirdie, US oner: In today's conformist society, anyone who isn't a carbon copy of his neighbour is regarded as an eccentric.