Synonyms for Wicked:

adj.

abandoned (adjective)
shameless, corrupt.
atrocious (adjective)
flagrant, diabolical, shocking, bad, monstrous.
bad (adjective)
infamous, criminal.
baneful (adjective)
destructive, calamitous, baleful, venomous, hurtful, poisonous.
barbarous (adjective)
cruel, sadistic, inhuman.
dangerous (adjective)
treacherous.
diabolical (adjective)
Fiendish.
dissolute (adjective)
wayward.
false (adjective)
rascally, perfidious.
hateful (adjective)
malicious, malevolent.
incorrigible (adjective)
irredeemable.
loose (adjective)
dissolute.
severe (adjective)
severe.
ugly (adjective)
low-down.
unjust (adjective)
iniquitous.
wicked (adjective)
evildoing, iniquitous, blameworthy, debauched, immoral, degenerate, scandalous, sinister, wrongdoing, debased, indecent, obnoxious, lawbreaking, felonious, depraved, perverse, damnable, shocking, criminal, reprehensible, bad, Misdoing, villainous, sadistic, sinful, improper, black, corrupt, base.

n.

gross out, malign, despiteful, awesome, attitude, my bad, poisonous, word up, be the bomb. easy, troublesome, pesky. naughty (noun)
roguish, naughty.

Other synonyms:

deviant, despiteful, gross out, incorrigible, sordid, salacious, amoral. inhuman, naughty, pesky, awesome. gross, poisonous, malign. troublesome. base
rascally.
corrupt
rotten.
disgraced
degraded.
distorted
perverted.
fiendish
Fiendish.
shameful
ignoble.
vicious
cruel.

Usage examples for wicked

  1. " I got real angry at last, and said I wouldn't have any thing to do with such wicked cruel boys. – Little Robins' Love One to Another by Madeline Leslie
  2. You made me wicked – The Iron Woman by Margaret Deland
  3. The wicked one nodded. – The Children of the Poor by Jacob A. Riis