English to English

noun (n)

• wicked and cruel behavior(noun.act)

  Synonym:
  deviltry
  

  source: wordnet30
• reckless or malicious behavior that causes discomfort or annoyance in others(noun.act)

  Synonym:
  devilment, deviltry, mischief, mischief-making, mischievousness, rascality, roguery, roguishness, shenanigan
  

  source: wordnet30
• Conduct suitable to the devil; extreme wickedness; deviltry.(noun)

  source: webster1913