The given words "Downfall, Seelow, Dome, Upheaval" are all related to World War II. Downfall refers to the end of the war, Seelow is a battle that took place during the war, and Upheaval represents the major changes and disruptions caused by the war. Dome, on the other hand, does not directly relate to any specific event or term in World War II. Therefore, the question could be asking to identify the word that does not belong to the World War II context, making the answer "Dome".