Akademik

unpredictability
noun
1. the quality of being guided by sudden unpredictable impulses (Freq. 1)
Syn: ↑capriciousness
Derivationally related forms: ↑capricious (for: ↑capriciousness)
Hypernyms: ↑inconstancy, ↑changefulness
2. the trait of being unpredictably irresolute
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the volatility of the market drove many investors away

Syn: ↑volatility
Derivationally related forms: ↑volatile (for: ↑volatility)
Hypernyms: ↑irresoluteness, ↑irresolution
3. lacking predictability
Ant: ↑predictability
Derivationally related forms: ↑unpredictable
Hypernyms: ↑uncertainty, ↑uncertainness, ↑precariousness

Useful english dictionary. 2012.