freaky

extraordinary, fantastic (also fantastical), freak, freakish, phantasmagoric (or phantasmagorical), phenomenal

bizarre, bizarro, cranky, crazy, curious, eccentric, erratic, far-out, funky, funny, kinky, kooky (also kookie), odd, offbeat, off-kilter, off-the-wall, outlandish, out-of-the-way, outré, peculiar, quaint, queer, queerish, quirky, remarkable, rum [chiefly British], screwy, spaced-out, strange, wacky (also whacky), way-out, weird, weirdo, wild

aberrant, abnormal, addlepated, flaky

atypical, rare, singular, uncommon, uncustomary, unique, unusual, unwonted

conspicuous, notable, noticeable, outstanding, prominent, salient, striking

atrocious, outrageous, shocking

crotchety, idiosyncratic, nonconformist, nonmainstream, out-there, unconventional, unorthodox

baffling, bewildering, confounding, mystifying, perplexing, puzzling