timid
afraid
aghast
appalled
ashen
astounded
awed
awestricken
awestruck
blanched
browbeaten
bullied
chicken
chickenhearted
coward
cowardly
cowed
daunted
deadly pale
dismayed
fainthearted
fearful
frozen
funking
funky
gray with fear
hangdog
henhearted
horrified
horror-struck
lily-livered
milk-livered
milksoppish
milksoppy
mousy
overtimid
overtimorous
pale as death
pallid
panic-prone
panicky
paralyzed
petrified
pigeonhearted
rabbity
scared stiff
scared to death
sissified
sissy
soft