Demilitarize is the process of reducing or eliminating military forces and weapons from a particular area or region. Antonyms are words that are opposite in meaning to a particular word. The antonyms for the word "demilitarize" are militarize, arm, equip, fortify, and strengthen. Militarize means to equip with military forces and weapons. Arm refers to the provision of weapons or armaments. Equip means to provide with necessary tools, weapons, or supplies. Fortify means to strengthen or protect a place with military forces or weapons. Strengthen means to make something stronger or more powerful, in this context, with military forces or weapons. These words indicate the opposite of demilitarize and are commonly used in contexts related to military actions and warfare.