Activeness (Noun)

The state of being active; "his sphere of activity"; "he is out of action".

Nouns denoting natural processes.

The team's activeness in the competition was impressive, with multiple wins under their belt.
Her activeness in the community earned her a reputation as a dedicated volunteer.
The new exercise routine brought a renewed sense of activeness to his daily routine.
The activeness of the toddler made it difficult for the parents to keep up with their energetic child.
The athlete's injury forced him to reduce his activeness on the field for the remainder of the season.

The trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age".

Nouns denoting attributes of people and objects.