Cannon: a gun that fires cannonballs and destroys ships

Canon: something that is confirmed by the creator of the show. It too destroys ships.

Edit: thanks for the gold! Now I can get a free month of Chess.com!

Double Edit: Twice in one day? 2 months of Chess!

[Oh baby a triple!] (http://youtu.be/OQj2L5Zuv9Y)