Roget's Thesaurus

#487. Incredulity

Nouns

incredulousness, incredulity; skepticism, pyrrhonism; want of faith etc. (irreligion) 989. suspiciousness etc. adj.; scrupulosity; suspicion etc. (unbelief) 485. mistrust, cynicism. unbeliever, skeptic, cynic; misbeliever, pyrrhonist; heretic etc. (heterodox) 984.

Verbs

be incredulous etc. adj.; distrust etc. (disbelieve) 485; refuse to believe; shut one's eyes to, shut one's ears to; turn a deaf ear to; hold aloof, ignore, nullis jurare in verba magistri [Lat.].

Adjectives

incredulous, skeptical, unbelieving, inconvincible; hard of belief, shy of belief, disposed to doubt, indisposed to believe; suspicious, scrupulous, distrustful, cynical;