noun (n)

• a lack of attentiveness (as to children or helpless people)(noun.cognition)

  Synonym:
  inattentiveness
  Antonym:
  attentiveness, heed, paying attention, regard
  

  source: wordnet30
• the trait of acting rashly and without prudence(noun.attribute)

  Synonym:
  mindlessness, rashness
  

  source: wordnet30
• the trait of forgetting or ignoring your responsibilities(noun.attribute)

  Synonym:
  inadvertence, inadvertency, unmindfulness
  Antonym:
  heedfulness, mindfulness
  

  source: wordnet30