n. 25B6; adjective eccentric behaviour : UNCONVENTIONAL, uncommon, abnormal, irregular, aberrant, anomalous, odd, queer, strange, peculiar, weird, bizarre, outlandish, freakish, extraordinary; idiosyncratic, quirky, nonconformist, outré; informal way out, offbeat, freaky, oddball, wacky, cranky; Brit. informal rum; N. Amer. informal kooky, wacko.
conventional.
25B6; noun he was something of an eccentric : ODDITY, odd fellow, character, individualist, individual, free spirit; misfit; informal oddball, queer fish, weirdo, freak, nut, head case, crank; Brit. informal one-off, odd bod, nutter; N. Amer. informal wacko, screwball.