Antonyms of noun credibility

1 sense of credibility

Sense 1
credibility, credibleness, believability -- (the quality of being believable or trustworthy)
       Antonym of incredibility (Sense 1)
      => incredibility, incredibleness -- (the quality of being incredible)

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

1 sense of credibility

Sense 1
credibility, credibleness, believability -- (the quality of being believable or trustworthy)
       => quality -- (an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare)