Synonyms for Scare:

n.

apprehension. terrorize, chill, scare the daylights out of, frighten/scare the wits out of someone, scarify, shake up, fear. bogie, bugaboo, cancer, demons, concern, blanket, bugbear, canker, bogey. quake, chicken out, be/live in dread of, have a horror of (doing) something, take fright, lose your nerve, quail, live in fear (of). fear (noun)
bugaboo.
fright (noun)
fear.
frightened state (noun)
alert, fright, panic, shock, alarm.
ghost (noun)
bugbear.
scare (noun)
fright, frighten, panic, panic attack, affright.
state (noun)
panic.

v.

alarm (verb)
startle, alert, signal, dismay, surprise, shock.
frighten (verb)
haunt, rattle, disturb, unnerve, petrify, agitate, alarm, panic, terrify, horrify, harrow, set on edge.
frighten someone (verb)
intimidate, petrify, startle, affright, dismay, chill, terrify, spook, shake up, terrorize.
haunt (verb)
spook.
threaten (verb)
browbeat, bulldoze, hint, threaten, harass, intimidate, torment, admonish, forebode, Forewarn, frighten, warn, bully.

Other synonyms:

apprehension, fear. terrorize, shake up. chill. frighten
affright, scarify, petrify.
Other relevant words:
apprehension, bugaboo, panic attack, terrorize, fright, scarify, shake up, affright, chill, take fright, fear, scare the daylights out of, bugbear.

Usage examples for scare

  1. " We didn't want to scare her," added Lark. – Prudence of the Parsonage by Ethel Hueston
  2. He might scare them out, or scold them out, or pray them out, or trick them out. – Modern Religious Cults and Movements by Gaius Glenn Atkins
  3. An' I didn't try to scare that other herd, honest. – Hopalong Cassidy by Clarence E. Mulford