Vigorus workout?
Climax is another word for orgasm.
Another word for "louder" could be "noisier" or "more intense in volume."
activity
hub
activity
Busywork.
A flurry of activity
Loud is another word for deafening. Additional synonyms include noisy and intense.
His intense scrutiny was alarming.The flavor was intense. Battle is an intense experience.
Community activity center.
intense
Answer: Energy