Antonyms of noun plausibility

1 sense of plausibility

Sense 1
plausibility, plausibleness -- (apparent validity)
       Antonym of implausibility (Sense 1)
      => implausibility, implausibleness -- (the quality of provoking disbelief)

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

1 sense of plausibility

Sense 1
plausibility, plausibleness -- (apparent validity)
       => credibility, credibleness, believability -- (the quality of being believable or trustworthy)