Fear ...

Abhorrence, agitation, angst, anxiety, apprehensiveness, aversion, awe...

bugbear...

chickenheartedness, cold feet, cold sweat, concern, consternation, cowardice, creeps...

despair, discomposure, dismay, disquietude, distress, doubt, dread...

faintheartedness, foreboding, fright, funk...

horrorjitters...

misgiving, nightmare...

panic, phobia, presentiment...

qualm..

recreancy, reverence, revulsion...

scare, suspicion...

terror, timidity, trembling, tremor, trepidation...

unease, uneasiness...

worry...