Antonyms of adv credibly

1 sense of credibly

Sense 1
credibly, believably, plausibly, probably -- (easy to believe on the basis of available evidence; "he talked plausibly before the committee"; "he will probably win the election")
       Antonym of incredibly (Sense 1)
      => incredibly, improbably, implausibly, unbelievably -- (not easy to believe; "behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains")

Synonyms of adv credibly

1 sense of credibly

Sense 1
credibly, believably, plausibly, probably -- (easy to believe on the basis of available evidence; "he talked plausibly before the committee"; "he will probably win the election")