Collocations for cannon - noun

automatic
water
Riot police used water cannon to disperse the crowd.

load, mount
aim
fire, shoot

boom, roar, thunder
Cannons thundered to their right.

fire (sth), shoot (sth)
As the king stepped ashore the cannons fired a salute.

ball (usually cannonball), shell
blast, fire, shot
crew
fodder (figurative)
The foot soldiers were just used as cannon fodder (= considered not as people but as material to be used up in war).