The term WAR HAZARD can be summarized by the crossword solution MINE, which is a four-letter word. A MINE is an explosive device that is used in warfare to cause destruction and damage to enemy forces. Mines are typically placed in the ground or on the surface of the water and can be triggered by pressure, movement, or remote control. Mines can also be used to protect an area from enemy forces. Mines have been used in warfare since ancient times and remain a common weapon today.