Antonyms of noun predictability

1 sense of predictability

Sense 1
predictability -- (the quality of being predictable)
       Antonym of unpredictability (Sense 3)
      => unpredictability -- (lacking predictability)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun predictability

1 sense of predictability

Sense 1
predictability -- (the quality of being predictable)
       => certainty, sure thing, foregone conclusion -- (something that is certain; "his victory is a certainty")