Antonyms of adj incredulous

1 sense of incredulous

Sense 1
incredulous (vs. credulous) -- (not disposed or willing to believe; unbelieving)

credulous (vs. incredulous) -- (disposed to believe on little evidence; "the gimmick would convince none but the most credulous")
        => credible -- ((a common but incorrect usage where `credulous' would be appropriate) credulous; "she was not the...credible fool he expected")
        => overcredulous -- (too credulous for your own good)
        => unquestioning -- (not inclined to ask questions)

Similarity of adj incredulous

1 sense of incredulous

Sense 1
incredulous (vs. credulous) -- (not disposed or willing to believe; unbelieving)
       => disbelieving, skeptical, sceptical, unbelieving -- (denying or questioning the tenets of especially a religion; "a skeptical approach to the nature of miracles")
          Also See-> distrustful#1; incredible#1, unbelievable#1