Cannonball (noun)

1. A solid ball, usually made of iron, that is fired from a cannon as a weapon or for demonstration purposes.
2. A move in diving or gymnastics in which a person jumps head first into water or performs a somersault in the air.

Origin:

Late 16th century, from the word 'cannon' meaning a large, heavy gun.

Examples:

1. The cannonball caused a loud explosion as it hit the target.
2. The cannonball was a feared weapon in the early days of warfare.
3. The diver executed a perfect cannonball into the pool, creating a splash that sent water flying in all directions.
4. The gymnast performed a series of flips and ended with a spectacular cannonball.
5. The cannonball was often used to test the strength and accuracy of cannons during battle.