1) Bad chance 2) Bare possibility 3) Doubtfulness 4) Ghost of a chance 5) Implausibility 6) Improbableness 7) Incredibility 8) Little chance 9) Long odds 10) No chance 11) Poor chance 12) Scarcely any chance 13) Small chance 14) Uncertainness 15) Uncertainty 16) Unfavorable chance 17) Unlikelihood 1) Doubt 2) Improbableness 3) Strangeness 4) Unlikelihood 5) Unlikeliness 
• (n.) The quality or state of being improbable; unlikelihood; also, that which is improbable; an improbable event or result.
Im·prob`a·bil'i·ty noun ; plural Improbabilities . [ Confer French improbabilité .] The quality or state of being improbable; unlikelihood; also, that which is improbable; an improbable event or result. 
[n] - the quality of being improbable
improbability 1. Not likely to be true or to occur or to have occurred. 2. The quality or condition of being improbable; unlikelihood. 3. Something improbable or unlikely.
improbableness noun the quality of being improbable; `impossibility should never be confused with improbability`; `the improbability of such rare coincidences`
the quality or condition of being improbable; unlikelihood. · something improbable or unlikely.