Pyrrhonism
apprehension
awake a doubt
be diffident
be doubtful
be dubious
be possessive
be skeptical
be uncertain
cageyness
call in question
caution
challenge
chariness
contest
diffidence
disbelief
disbelieve
discredit
dispute
distrustfulness
doubt
doubtfulness
dubiety
dubiousness
greet with skepticism
half believe
half-belief
harbor suspicions
have reservations
heartburn
hesitancy
hesitation
incredulity
jealouse
jealousy
leeriness
misdoubt
misgive
misgiving
mistrust
mistrustfulness
qualm
query
question
raise a question
incertitude
uncertainty
distrusted
distrusting
distrusts
antagonism
bitterness
contempt
discontent
dislike
dismay
distaste
hostility
reluctance
suspicion
uneasiness
adjust
antitrust
brust
bused
bussed
bust
combust
crust
cussed
discussed
disgust
dust
encrust
entrust
fussed
fust
gust
hust
incrust
just
lust
must
nonplussed
readjust
robust
rust
thrust
trust
unjust
assurance
reliance