have the wind up
get the wind up
put the wind up
tremble
fray
have one's heart in one's boots
flay
brick it
spook
apprehend
spook out
quake in one's boots
dread
gloppen
run scared
shake
crap oneself
terrifyingness
fear
fearfully
freak out
funk
affright
harrow
frighten
curl someone's hair
fearsomely
frighten the piss out of
glope
make someone's hair stand on end
scary
piss one's pants
crap one's pants
panic
not bear thinking about
frightenedness
perturb
flaysome
geek out
afraid
do someone a frighten
frightened
scare the hell out of
pavid
make someone's skin crawl
trepidly
fearlike
terrifying
scared
scarecrow