The phrase "war of secession" is commonly used to describe the American Civil War, but there are several synonyms that can be used instead. "War between the states" is a popular alternative, as it emphasizes the regional nature of the conflict. "The rebellion" is another term that captures the idea of one side rebelling against the other. "The war for Southern independence" is a phrase often used by Confederate sympathizers to emphasize the goal of secession. "The Confederate War" is another option that puts the focus on the Southern states that seceded. Ultimately, the choice of synonym depends on one's perspective on the causes and outcomes of the war.