• scared, scary, startled
• fractious, jittery, milquetoastish, scary, shy, skittish, timorous, weak-kneed
• appalling, awful, daunting, dreadful, fearsome, formidable, frightful, grim, gruesome, redoubtable, scary, startling, unearthly
• alarm, dread, fright, shock, turn
• skittishness, timorousness
• atrociously, dauntingly, dreadfully, startlingly