The phrase "is at odds" means there is a disagreement or conflict between two or more parties. There are several synonyms to replace this phrase in conversation or writing. One of them is "are in conflict," which implies a struggle or a clash of interests. Another alternative is "are diametrically opposed," which suggests a situation in which two opinions or positions are completely opposite. "Don't see eye to eye" is another synonym that describes a disagreement, often due to different perspectives. Finally, "are at loggerheads" is a phrase that depicts two sides being in intense disagreement or not being able to reach an agreement.