Rammer
Rammer (ram"mẽr) , noun
(Founding) One who, or that which, rams or drives.
(a)
(Founding) An instrument for driving anything with force; as, a rammer for driving stones or piles, or for beating the earth to more solidity.
(b)
(Founding) A rod for forcing down the charge of a gun; a ramrod.
(c)
(Founding) An implement for pounding the sand of a mold to render it compact.