freak out
make someone's hair stand on end
put the shits up someone
scare the hell out of
do someone a frighten
scare the life out of
scarecrow
scare the pants off
geek out
scare the living daylights out of
make someone's flesh creep
curl someone's hair
put the heart across one
scare the shit out of
give someone the shits
flay
frighten the life out of someone
scare someone to death
put the wind up
spook
spook out
have the wind up
fray
get the wind up
rattle
make someone's skin crawl
not bear thinking about
creep out
concern
rub up the wrong way
disquiet
get someone's back up
raise someone's hackles
get someone's goat
feared
get someone's Irish up
mither
dread
get someone's dander up
scare
set up someone's birse
put the fear of God into
terror
brick it
tremble
worry someone sick
cringeful
comb someone's hair the wrong way
get on someone's bad side
send shivers down someone's spine
jump in one's skin
pants-shittingly
panic
wrack
eat
scaringly
harrow
frightenedness
chap someone's hide
frighten the piss out of
apprehend
get under someone's skin
trepidly
terrorize
tread on someone's toes
funk
disembarrassment
have one's heart in one's boots
out of one's skin
dreadful
fearsomely
horrendous
terrible
scare straight
boo
frightfulness
horrific
awful
fearful
dreaded
fearsome
befright
frightening
direful
dire
turn off
get up someone's nose
worryingly
crap oneself