skeptical attitude or temper; doubt.

doubt or unbelief with regard to a religion, esp. Christianity.

( initial capital letter ) the doctrines or opinions of philosophical Skeptics; universal doubt.

noun

credulity

noun

agnosticism , apprehension , disbelief , distrust , dubiety , dubiousness , faithlessness , hesitation , indecision , lack of confidence , leeriness , questioning , reluctance , suspicion , uncertainty , doubtfulness , incertitude , mistrust , question , wonder , concern , doubt , incredulity , infidelity , pyrrhonism