bustling (adjective)

1. During the California Gold Rush, the town of San Francisco was a bustling hub of activity.

2. The bustling city of Tokyo is known for its modern architecture and interior design.

3. Why did the scarecrow decide to become a doctor? Because he wanted to help people in a bustling emergency room.

4. In a bustling futuristic city, robots whizzed by on hoverboards, performing tasks with precision and efficiency.