What is a difference between World War 2 and the Cold war?

World War II was the largest, most destructive conflagration in human history ... The Cold War, so-called because a major war between the United States and its North Atlantic allies on one side and the Soviet Union and its satellite nations on the other, never occurred.

the cold war wasn't actually a full blown war, as it was more large tensions between the soviet union and the united states, unlike world war 2, which was an actual war between multiple countries.