Antonyms of noun likeliness

1 sense of likeliness

Sense 1
likelihood, likeliness -- (the probability of a specified outcome)
       Antonym of unlikeliness (Sense 1)
      => unlikelihood, unlikeliness -- (the improbability of a specified outcome)

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

1 sense of likeliness

Sense 1
likelihood, likeliness -- (the probability of a specified outcome)
       => probability -- (the quality of being probable; a probable event or the most probable event; "for a while mutiny seemed a probability"; "going by past experience there was a high probability that the visitors were lost")