noun (n)

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

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

  source: wordnet30
• the trait of not being considerate and thoughtful of others(noun.attribute)

  Antonym:
  attentiveness
  

  source: wordnet30