do someone a frighten
scare the hell out of
spook out
jump in one's skin
crap one's pants
piss one's pants
spook
flay
fearing
frighten the piss out of
timorsome
fearful
overfrighten
funk
poopless
put the wind up
fear
scare the shit out of
scare someone to death
frighten the life out of someone
terrify
frightenable
frightsomeness
frightfulness
scareful
terrifiedness
brick it
make someone's hair stand on end
frightenedness
ph33r
have the wind up
out of one's skin
startful
tremble
quiver
flaysome
chill
tingle
shiver
frightened
shudder
frisson
fray
run scared
thrill
scared
petrification
frightenedly
apprehend
eerie