1) Chanceful 2) Dangerous 3) Dicey 4) Dodgy 5) Far from certain 6) Fraught with risk 7) Haphazard 8) Hazardous 9) High-risk 10) Like a long shot 11) Lucky 12) Not for sure 13) Of uncertain outcome 14) Random 15) Rather doubtful 16) Risky 17) Subject to chance 18) Uncertain 19) Unsafe 20) With a bit of risk 1) Chanceful 2) Dangerous 3) Dicey 4) Dodgy 5) Flukey 6) Fluky 7) High risk 8) Iffy 9) Risky 
[adj] - of uncertain outcome 2. [adj] - (informal) subject to accident or chance or change
chanceful adjective of uncertain outcome; especially fraught with risk; `an extremely dicey future on a brave new world of liquid nitrogen, tar, and smog`- New Yorker
uncertain, hazardous, or risky. · random; haphazard; subject to chance. · lucky.