"Wiping the slate" is an idiom that typically means to start fresh or begin anew. There are a variety of synonyms that can be used to convey a similar meaning, including "starting over," "resetting," "rebooting," "cleaning the slate," and "erasing the past." Other synonyms that may be used in different contexts include "turning a new leaf," "forgiving and forgetting," and "starting from scratch." These phrases all imply a desire to move forward and put the past behind, whether it be in a personal or professional setting. Using synonyms can help add variety to your writing and convey a similar meaning in a more interesting way.