1) Adrenaline producer 2) Aerial near-miss 3) Alarm 4) Alarming event 5) Alarming situation 6) Anxiety 7) Anxiousness 8) Be a bugbear 9) Be an effective ghost 10) Cares about shock 11) Cause alarm to 12) Cause fear in 13) Cause for alarm 14) Cause goosebumps 15) Cause of blanching 16) Cause to jump Found on https://www.crosswordclues.com/clue/scare
• (n.) Fright; esp., sudden fright produced by a trifling cause, or originating in mistake. • (v. t.) To frighten; to strike with sudden fear; to alarm. Found on http://thinkexist.com/dictionary/meaning/scare/
Scare noun Fright; esp., sudden fright produced by a trifling cause, or originating in mistake. [ Colloq.] Found on http://www.encyclo.co.uk/webster/S/27
noun sudden mass fear and anxiety over anticipated events; `panic in the stock market`; `a war scare`; `a bomb scare led them to evacuate the building` Found on https://www.encyclo.co.uk/local/20974