Start out is a phrasal verb that means to begin or set out on a particular path or course. There are several synonyms for this common phrase that can be used to add variety and spice up your writing. One synonym for start out is embark, which conveys the sense of beginning a journey or undertaking a task. Another synonym is commence, which suggests a more formal or official beginning. Other synonyms include initiate, launch, kick off, and get underway. Each of these words can be used in place of start out to add a different tone or connotation to your writing, depending on the context.