Busywork.
Meaning : tightly closed-lips, secretive, close-mouthed, quite, silent. Now you can make sentence yourself.
Archibald Boyd has written: 'The Word preached, yet profitless'
activity
hub
activity
A flurry of activity
Community activity center.
Hibernation does not have a direct a antonym, but the word activity is close. Another related word is functioning / functional.
Vigorus workout?
A detective or investigator is another word for a person employed to find out information and examine any unlawful activity.
sporty
Computers: Software, application The world: Event, activity