havoc

schoolchildren wreaking havoc in the classroom.

The wind will wreak havoc on my garden.

The earthquake wreaked havoc on the city.

a wild party that created havoc in the house.

shift work plays havoc with the body clock.

torrential rainstorms wreaked havoc yesterday.

This concentration of airborne firepower played havoc with the enemy forces.

The terrible storms wreaked havoc with electricity supplies, because so many power lines were down.

Very similar to a hedgehog, except that the knarl takes offense easily and will wreak havoc on garden plants (FB).