Saul of Tarsus, also known as Paul the Apostle, was a prominent figure in early Christianity. He was known for his missionary work and for writing several letters that are now part of the New Testament. Some synonyms for "Saul of Tarsus" could include "Paul of Tarsus," "the Apostle Paul," "Saint Paul," or simply "Paul." Depending on the context, other possible synonyms could include "early Christian leader," "missionary," "New Testament writer," or "founder of Christian communities." Regardless of the specific term used to refer to him, Paul's impact on Christianity is widely recognized and his teachings continue to be studied and followed by millions of believers around the world.