Synonyms for Horrifying:

adj.

deplorable (adjective)
scandalous.
offensive (adjective)
outrageous, atrocious.

n.

repulsive, revolting, detestable, sickening. indecent, outrageous, disgusting, taboo, scandalous. horrifying (noun)
atrocious, frightful, alarming, ugly, horrible.

v.

frightening (verb)
petrifying, setting on edge, agitating, unnerving, frightening, intimidating, haunting, harrowing, threatening, panicking, Scaring, terrifying, alarming, rattling, disturbing.
haunting (verb)
spooking.

Other synonyms:

disgusting, scandalous. taboo. Other relevant words:
taboo, disgusting, ugly, outrageous, repulsive, revolting, frightful, atrocious, horrible, detestable, scandalous, sickening.

Usage examples for horrifying

  1. How long he could have endured is doubtful, but release came in a startling, and, to most of the members of the mess, a truly horrifying manner. – The Sky Pilot in No Man's Land by Ralph Connor
  2. Accustomed as he was to perilous situations, to horrifying sights, the strain upon his nerves was becoming painfully intense. – The Sign of the Spider by Bertram Mitford
  3. The mask and the convict garb recalled that terrible midnight at Craig's house and the later episode at the jail, blent in a shuddering composite, even as the significance of the scene came home to her with a sudden horrifying clarity. – The Long Lane's Turning by Hallie Erminie Rives