Noun activeness has 2 senses
  1. action, activity, activeness - the state of being active; "his sphere of activity"; "he is out of action"
    --1 is a kind of state
    Antonyms: inaction, inactivity, inactiveness
    --1 has particulars:
     agency; busyness, hum; behavior, behaviour; eruption, eructation, extravasation; operation; overdrive; play; swing
  2. activeness, activity - the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age"
    --2 is a kind of trait
    Antonyms: inactiveness, inactivity, inertia
    --2 has particulars:
     animation, spiritedness, invigoration, brio, vivification; dynamism, pizzazz, pizzaz, oomph, zing