affright, alarm(also alarum), fright, frighten, horrify, panic, scare, scarify, shock, spook, startle, terrify, terrorize

appall(also appal), bowl over, dismay, floor, jolt, shake, shake upamaze, astound, awechill, daunt, demoralize, dispirit, emasculate, psych (out), undo, unman, unnerve, unstringdiscomfort, discompose, disconcert, disquiet, distract, distress, disturb, perturb, unsettle, upset, worry

make one's flesh creep(or make one's flesh crawl)

reassure

assure, cheer, comfort, console, solace, sootheembolden, encourage, hearten, inspire, steel