afraidShe was afraid of the dark.
frightenedDon't be frightened, my dog is quite friendly.
scaredAre you scared of spiders?
petrifiedHe got to the top of the tree and was absolutely petrified he'd fall.
terrifiedI'm terrified of flying.
panic-strickenShe was panic-stricken when her little boy disappeared.
worriedI'm worried that something will go wrong.
nervousStop playing with that knife - you're making me nervous!
apprehensiveHe's a bit apprehensive about living away from home.
uneasyAll this quiet makes me uneasy.
hair-raisingThe pilots are trained to do hair-raising stunts at low altitude.