havoc

Widespread destruction or chaos; great confusion or disorder.

• (no common derivatives)

• wreak havoc
• cause havoc
• create havoc
• play havoc with
• utter havoc

1. 1.The hurricane wreaked havoc on the coastal towns, destroying hundreds of homes. (destruction)
2. 2.The software bug played havoc with the scheduling system, double-booking every room in the hotel. (chaos)

• chaos/ˈkeɪɒs/— complete disorder
• devastation/ˌdɛvəˈsteɪʃən/— great destruction
• turmoil/ˈtɜːrmɔɪl/— a state of great disturbance

from Anglo-French "havok" — the war cry "cry havoc" was the signal to soldiers that they could begin plundering