"Cease and desist" is a legal ultimatum that requires one to immediately stop performing an illegal act. There are a few synonyms for the phrase that one can use alternately depending on the context. Some of the synonyms include "halt and desist," "stop and abstain," and "discontinue and refrain." These alternatives are usually used in legal documents and formal settings where the usage of different words will add variety and interest to the text. They all possess the same meaning as "cease and desist," ensuring the recipient of the letter understands the gravity of the situation and must act accordingly.