a cannon ball
 

* 1.gun-stone

English Related Words* a loose cannon

* a lot on the ball

* automatic cannon

* bald as a billiard ball

* ball

* ball ammunition

* ball and chain

* ball and socket

* ball and socket clamping screw

* ball and socket joint

* ball bearing

* ball bearing crankshaft

* ball bearing cup

* ball bearing grease

* ball bearing seat