A Grenade.
Spear most likely, it can be thrown too.
boomarang
A stone that could be thrown .
A silver knife, thrown by Bellatrix.
The Byzantine Empire used a weapon called Greek fire, which no other group had. It was a flame thrower of some sort, but could alternately be a bomb or grenade that was thrown and burst into fire on impact.
Thor's weapon is called Mjölnir. It is a powerful hammer that, according to Norse mythology, was forged by dwarven brothers and is capable of returning to Thor when thrown. Mjölnir symbolizes Thor's role as a protector of gods and humanity, and it is often associated with lightning and thunder.
Probably as a weapon to be thrown, or as a cave shelter.
a weapon that is forcibly thrown or projected at a targets but is not self-propelled
Spear, harpoon, knife, dagger, rock, ...
A boomerang is a weapon that starts with the letter B, and returns to its owner when thrown.
A boomerang is a weapon that, when thrown, follows a curved trajectory and returns to the thrower. It is designed to come back due to its unique aerodynamic shape and spin. Boomerangs have been historically used for hunting and recreation by Indigenous Australians.
A weapon consisting of balls connected by strong cord, which when thrown entangles the limbs of the quarry.