mallet

A tool resembling a hammer but with a large head (usually wooden); used to drive wedges or ram down paving stones or for crushing or beating or flattening or smoothing.

A light drumstick with a rounded head that is used to strike such percussion instruments as chimes, kettledrums, marimbas, glockenspiels, etc.

A sports implement with a long handle and a head like a hammer; used in sports (polo or croquet) to hit a ball.