noun (n)

• an attribute of mischievous children(noun.attribute)

  Synonym:
  badness, naughtiness
  

  source: wordnet30
• the trait of behaving like an imp(noun.attribute)

  Synonym:
  impishness, puckishness, whimsicality
  

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

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

  source: wordnet30