Humism
Pyrrhonism
agnosticism
apprehension
caution
cautiousness
concern
diffidence
disinclination to believe
distrust
distrustfulness
doubt
doubtfulness
dubiety
dubiousness
guardedness
half-belief
incertitude
inconvincibility
incredulity
leeriness
misdoubt
misgiving
mistrust
mistrustfulness
nihilism
pyrrhonism
pyrrohonism
qualm
qualmishness
question
resistiveness to belief
scoffing
scruple
scrupulousness
self-doubt
shadow of doubt
skepticalness
suspicion
suspiciousness
total skepticism
tough-mindedness
uncertainty
unconvincibility
uncredulousness
unpersuadability
unpersuasibility
wariness
disbelief
unbelief
skeptic
skeptical
boredom
cynicism
disapproval
disdain
dismay
distaste
exasperation
indifference
perplexity
puzzlement
reluctance
resentment
scepticism
uneasiness
belief