Synonyms and related words :
aliene, bedlamite, blind bargain, chance, contingency, crackbrain, crackpot, dement, demoniac, double contingency, energumen, fanatic, flake, fou, gamble, guess, idiot, kook, loon, loony, lunatic, madman, maniac, meshuggenah, noncompos, nut, open question, phrenetic, piece of guesswork, question, raving lunatic, screwball, sight-unseen transaction, toss-up, touch and go, undecided issue, wager, weirdo,