The phrase "either-or" is commonly used to present two alternatives or options. However, there are several synonyms that can be used instead of "either-or" to convey the same meaning. One alternative is "alternatively," which suggests a choice between two distinct options. Another synonym is "pick one," which implies choosing between two possibilities. "Choose between" and "decide between" are also synonyms for "either-or" and indicate a decision between two options. Additionally, "this or that" can be used interchangeably with "either-or" to emphasize the limited number of choices. Therefore, the use of synonyms for "either-or" can add variety and clarity to writing or conversation.