Synonyms of appall

verbTo fill with horror or indignation; to dismay.

• terrify
• daunt
• frighten
• scare
• depress
• alarm
• affright literaryTo inspire fright in; to frighten, to terrify.
• dismayTo cause to feel apprehension; great sadness, or fear; to deprive of energy.
• give someone the shits vulgarTo creep someone out; to scare someone.
• harrow
• horrifyTo cause to feel extreme apprehension or unease; to cause to experience horror.
• make someone's blood run cold
• mortifyTo scare.
• petrifyTo immobilize with fright.
• scare straightTo frighten (someone) to such a degree that a significant improvement in behavior results.
• scare the bejeebers out of slangTo terrify thoroughly.
• scare the hell out of slangTo frighten (someone or an animal).
• scare the pants off of slang
• scare the shit out of slangTo make someone scared shitless.
• terrorize
• spook
• fray archaic
• grill Scotland, obsoleteTo terrify; make tremble.