The phrase "atomic war" refers to a large-scale conflict that involves the use of nuclear weapons. Unfortunately, there are numerous synonyms that can be used to describe such a devastating event. Some common alternatives include nuclear war, thermonuclear war, and atomic holocaust. While these terms have slightly different connotations, they are all used to describe the same catastrophic scenario. Other related terms include nuclear Armageddon, doomsday scenario, and mutually assured destruction. Regardless of the specific phrasing used, most people agree that an atomic war would be one of the worst things that could happen to humanity.