mistrust
suspect
mislippen
smell fishy
hinky
out of the corner of one's eye
jealous
suss
suspicion
oversuspicious
suspiciously
supersuspicious
smell a rat
suspicious
oversuspiciously
jalouse
sussy
suspicionful
doubtful
fishy
sus
unsuspectably
compromising
cat in the sack
suspicional
dubious
suspectingly
underlook
suspiciousness
scruple
convenient
suspectedly
scent
misdoubt
mistrustingly
lurkingly
shy
scare the hell out of
suspective
do someone a frighten
suspectable
beady-eyed
suspectly
querulent
snoopily
smelly
surmisant
slyish
suspectfulness
suspectedness