Synonyms for Scandalous:

adj.

atrocious (adjective)
barbaric, wicked, bad, villainous.
base (adjective)
common, cheap, sordid, depraved, disreputable, coarse, corrupt, indelicate, sleazy, ignoble, offensive, immoral.
criminal (adjective)
iniquitous.
deplorable (adjective)
horrifying, reprehensible, blameworthy.
dishonorable (adjective)
base, low.
disreputable (adjective)
lewd.
hateful (adjective)
invidious.
invidious (adjective)
libelous.
offensive (adjective)
outrageous.
scandalous (adjective)
outrageous, disgraceful, heinous, monstrous, unseemly, slanderous, infamous, libelous, atrocious, shameful, detractive, defamatory, shocking, calumnious, ignominious.
slanderous (adjective)
calumnious.
wicked (adjective)
debased, damnable, iniquitous, immoral, sinful, sinister, villainous, indecent, criminal, sadistic, lawbreaking, shocking, perverse, degenerate, debauched, blameworthy, black, Misdoing, depraved, reprehensible, evildoing, improper, wicked, bad, base, corrupt, wrongdoing, felonious, obnoxious.

n.

horrifying, taboo, horrific. defamatory, injurious, slanderous, law, libelous, detractive, calumnious, attack, invidious. disgraceful (noun)
infamous, lewd, disreputable.
scandalous (noun)
immoral, shocking, disgraceful, shameful.

Other synonyms:

horrific, lewd, calumnious. detractive, horrifying, slanderous, libelous, monstrous, heinous, defamatory, atrocious, invidious. injurious, taboo, enormous. Other relevant words:
injurious, enormous, disreputable, calumnious, infamous, invidious, libelous, outrageous, shameful, lewd, defamatory, taboo, heinous, atrocious, horrifying, disgraceful, detractive, horrific, slanderous, monstrous.

Usage examples for scandalous

  1. But he was not going to put up with such scandalous treatment. – The Danvers Jewels, and Sir Charles Danvers by Mary Cholmondeley
  2. You know, Stephen, it's perfectly scandalous – Major Barbara by George Bernard Shaw
  3. The tyranny which he exercised in that house was something scandalous – Maximina by Armando Palacio Valdés