a javelin.. its like a long spear.
A Grenade.
Spear most likely, it can be thrown too.
boomarang
yes why do you think knights use it?
Light saber
Yes.
The European knights wore a suit of armor and their weapon is a sword
Yes.
A stone that could be thrown .
A silver knife, thrown by Bellatrix.
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