• to frighten sy out of his wits, to scare daylight out of sy, to scare hell out of sy, to terrify sy out of his wits
• awful, dreadful, frightening, gruesome, morbid, scary, startling, terrifying
• to aghast, to alarm, to appal, to appall, to bewilder, to dismay, to fright, to frighten, to scare, to shock
