Cannonade

[Rihanna]

The act of discharging cannon and throwing ball, shell,
etc., for the purpose of destroying an army, or battering a town, ship,
or fort; -- usually, an attack of some continuance.

[Jason Yan]

noun
1.
a period of continuous, (heavy gun) fire.
synonyms: [bombardment], [shelling], [gunfire], artillery fire, barrage, pounding
verb
1.
discharge heavy guns continuously.

[Donald Trump]

A period of continuous heavy gunfire.