Antonyms of noun inactivity

2 of 3 senses of inactivity

Sense 1
inaction, inactivity, inactiveness -- (the state of being inactive)
       Antonym of activity (Sense 2)
      => action, activity, activeness -- (the state of being active; "his sphere of activity"; "he is out of action")

Sense 3
inactivity -- (being inactive; being less active)
       Antonym of activity (Sense 1)
      => activity -- (any specific behavior; "they avoided all recreational activity")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun inactivity

3 senses of inactivity

Sense 1
inaction, inactivity, inactiveness -- (the state of being inactive)
       => state -- (the way something is with respect to its main attributes; "the current state of knowledge"; "his state of health"; "in a weak financial state")

Sense 2
inactiveness, inactivity, inertia -- (a disposition to remain inactive or inert; "he had to overcome his inertia and get back to work")
       => trait -- (a distinguishing feature of your personal nature)

Sense 3
inactivity -- (being inactive; being less active)
       => act, deed, human action, human activity -- (something that people do or cause to happen)