Synonyms to monkey wrench

oddball, abnormal, absurd, alien, anomalous, anomaly, bizarre, black sheep, blemish, case, character, crackpot, crank, crankish, cranky, crosspatch, crotchety, curious, deviant, deviative, different, divergent, dotty, duck, eccentric, erratic, exceptional, fanatic, fey, flake, flaky, foreign body, foreign intruder, freak, freaked out, freakish, freaky, funny, hermit, hobo, idiocratic, idiosyncratic, impurity, individualist, inner-directed person, intruder, irregular, kinky, kook, kooky, lone wolf, loner, maggoty, maverick, meshuggenah, misfit, mote, natural, naysayer, nonconformist, nut, nutty, odd, odd fellow, oddity, off, off the wall, original, out, outlandish, outsider, pariah, passing strange, peculiar, quaint, queer, queer duck, queer fish, queer specimen, quirky, quiz, rara avis, recluse, screwball, screwy, singular, sliver, solitary, speck, splinter, spook, sport, stone, strange, strange duck, tramp, twisted, type, unconventional, unearthly, unnatural, wacky, weed, weird, weirdo, whimsical, wondrous strange, zealot, zombie, backslider, bad egg, bad lot, degenerate, fallen angel,