revelry
Loud, wild, and excited partying or celebrating.
Revelry is noisy, energetic celebrating and merrymaking. When a team wins the championship, the revelry in the locker room includes cheering, dancing, and spraying sports drinks everywhere. When people engage in revelry, they're whooping it up, making noise, and celebrating with wild enthusiasm.
The word suggests unrestrained fun and festivity. A quiet dinner party isn't revelry, but a New Year's Eve celebration with music, dancing, confetti, and people counting down to midnight definitely is. Street festivals often feature revelry as crowds enjoy music, food, and entertainment together.
You might read about revelry in stories about medieval feasts, where knights and nobles celebrated victories with elaborate parties that lasted late into the night. The word reveler describes someone participating in this kind of celebration. While revelry is joyful, it can sometimes get out of hand: revelry that disturbs neighbors or becomes destructive crosses the line from celebration into chaos.
Notice the energy in the word itself: revelry isn't calm or subdued. It's the explosive happiness that comes when people let loose and celebrate something wonderful together, without hurting anyone or damaging anything.