Synonyms for Scare away:

n.

chill, shake up, intimidate, terrify, startle, frighten/scare the wits out of someone, alarm, panic. scare away (noun)
dash, frighten off, daunt, scare off, frighten away, scare, pall.

v.

frighten (verb)
chill, startle, daunt, scare off, panic, terrify, alarm, intimidate.
scarify (verb)
scare.

Other synonyms:

frighten
scare off.