Ilich Sanchez is a proper name and is not interchangeable with any synonyms. It refers to a real person named Ilich Ramírez Sánchez, more commonly known as "Carlos the Jackal." Carlos was a Venezuelan terrorist and revolutionary who gained notoriety in the 1970s and 1980s for his numerous attacks on behalf of various communist and Palestinian causes. Due to his high-profile crimes, he was eventually captured and sentenced to life in prison. The name "Ilich Sanchez" may be misspelled or used as a nickname for Carlos, but it is not a synonym for the person himself.