noun (n)

• the state of being active(noun.state)

  Synonym:
  action, activity
  Antonym:
  inaction, inactiveness, inactivity
  

  source: wordnet30
• the trait of being active; moving or acting rapidly and energetically(noun.attribute)

  Synonym:
  activity
  Antonym:
  inactiveness, inactivity, inertia
  

  source: wordnet30
• The quality of being active; nimbleness; quickness of motion; activity.(noun)

  source: webster1913