Another name for World War I is The Great War.
World War I, was called the Great War because it was the first major global conflict that involved many of the world's great powers and spanned multiple continents. It was characterized by the use of modern weapons and tactics, and it resulted in a large number of casualties and significant destruction.
The Great War had a significant impact on global politics and society, and it led to significant changes in the international order. It was called the Great War because of the magnitude of its impact and the scale of the conflict.