WordNet (r) 3.0 (2006):

dicey
    adj 1: of uncertain outcome; especially fraught with risk; "an
           extremely dicey future on a brave new world of liquid
           nitrogen, tar, and smog"- New Yorker [syn: chancy,
           chanceful, dicey, dodgy]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "dicey":
   accidental, adventitious, adventurous, agnostic, aleatory,
   ambiguous, capricious, casual, causeless, chance, chancy,
   changeable, contingent, dangerous, destinal, difficult, doubtful,
   doubting, equivocal, erratic, fatal, fatidic, fickle, fluky,
   fortuitous, full of risk, hairy, hazardous, hesitant, hesitating,
   iffy, incalculable, incidental, indecisive, indemonstrable,
   indeterminate, irresolute, polysemous, riskful, risky, skeptical,
   speculative, ticklish, touch-and-go, tricky, unaccountable,
   uncaused, uncertain, unconfirmable, unconvinced, undetermined,
   undivinable, unexpected, unforeseeable, unforeseen, unlooked-for,
   unpersuaded, unpredictable, unprovable, unsure, unverifiable,
   variable, venturesome, venturous, wavering, whimsical, wildcat