40 synonyms for scare such as chill someone's blood, alarm, and appal. Scare is a verb, and its antonyms are reassure and assure.
Affright, alarm, appal, chill someone's blood, daunt, fill with fear, fright, frighten, give someone a fright, give someone a turn, give someone goose pimples, horrify, intimidate, make afraid, make fearful, make nervous, make someone's blood run cold, make someone's hair curl, panic, petrify, put the fear of God into, put the wind up, scare stiff, scare the bejesus out of, scare the hell out of, scare the pants off, scare witless, scare/frighten the life out of, scare/frighten to death, scarify, send into a cold sweat, shock, spook, startle, strike terror into, terrify, throw into a blue funk, throw into a panic, and unnerve.