The phrase "rule out" is commonly used to express the act of eliminating a possibility or option. However, there are various synonyms that can be used to convey the same meaning. Some of the synonyms for "rule out" include exclude, eliminate, dismiss, reject, and preclude. Each of these synonyms implies a sense of removing or disregarding a particular option or possibility. Depending on the context, one synonym may be more appropriate or effective than another. Regardless of the word choice, the idea of rejecting a possibility remains the same, conveying a sense of confidence in the remaining options.