There are several synonyms for the phrase "starting back," including restarting, recommencing, resuming, renewing, and picking up. Each of these words reflects the idea of beginning again or moving forward after a pause or interruption. Starting back can describe a wide range of activities, from returning to work after a vacation to resuming a particular project or activity. The choice of synonym will depend on the context and the tone of the message being conveyed. For example, restarting might denote a fresh start or a decision to change course, while resuming implies continuity and consistency.