Havoc

n.	1.	Wide and general destruction; devastation; waste. As for Saul, he made havoc of the church. - Acts viii. 3. Ye gods, what havoc does ambition make Among your works! - Addison.
v. t.	1.	To devastate; to destroy; to lay waste. To waste and havoc yonder world. - Milton.
interj.	1.	A cry in war as the signal for indiscriminate slaughter. Do not cry havoc, where you should but hunt With modest warrant. - Shak. Cry 'havoc,' and let slip the dogs of war! - Shak.

Noun

1.

havoc - violent and needless disturbance Synonyms: mayhem

abomination, atrocity, bad, bane, befoulment, blight, bloodbath, blue ruin, breakup, calamity, carnage, cataclysm, catastrophe, chaos, confusion, consumption, corruption, crying evil, damage, damnation, decimation, defilement, depredate, depredation, desecrate, desolate, desolation, despoil, despoiling, despoilment, despoliation, destruction, detriment, devastate, disintegration, disorder, disorganization, disruption, dissolution, evil, grievance, harm, harry, hecatomb, holocaust, hurt, ill, infection, injury, loss, mayhem, mischief, outrage, perdition, pillage, pillaging, poison, pollution, ravage, ravaging, ruination, sack, shambles, slaughter, spoliate, spoliation, the worst, toxin, undoing, upset, vandalism, venom, vexation, waste, woe, wrack, wrack and ruin, wreck, wrong