When it comes to writing, there are a multitude of ways to express that one is beginning or actively working on a written piece. Some synonyms for "write on" include "commence writing," "begin scribbling," "initiate a draft," "start crafting," "embark on composition," "undertake authorship," "commence penning," and "initiate manuscript." These phrases allow individuals to articulate their writing process and convey their dedication to the task at hand, whether it be a school assignment, business proposal, or creative endeavor. So, whether you "commence writing" or "initiate manuscript," let your words flow and bring your ideas to life on the page.