Fait accompli is a French term that means a deed or an action that has already been completed and cannot be reversed. There are a number of synonyms for this term that can be used in various contexts. One such synonym is "done deal," which refers to a decision or agreement that has been finalized. Another synonym is "accomplished fact," which describes an action that has already been taken and cannot be undone. "Irreversible action" is also a synonym for fait accompli that emphasizes the permanent nature of the action or decision. Other synonyms for this term include "final outcome," "concluded matter," and "settled issue".