noun (n)

• an unintentional omission resulting from failure to notice something(noun.cognition)

  Synonym:
  oversight
  

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

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

  source: wordnet30
• The quality of being inadvertent; lack of heedfulness or attentiveness; inattention; negligence; as, many mistakes proceed from inadvertence.(noun)

  source: webster1913