Gonion is a word that refers to the most posterior or backward point of the lower jaw at the angle where the jawbone meets the curve of the ramus. While there may not be many synonyms for this specific term, other medical and anatomical terms can be used to describe this area of the face. Some of these synonyms include the mandible, the jawbone, the condylar process, and the angle of the mandible. Each of these terms describes an aspect of the lower jaw and can be used in different contexts depending on what is being discussed. However, gonion remains the most accurate and specific term for this particular anatomical feature.