Nasion is a term used in anatomy to refer to the junction of the frontonasal suture and the nasal bones. While there may not be many common synonyms for this term, some related terms include the nasofrontal angle, which is the angle formed by the junction of the nasal bone and the frontal bone. The term glabella can also be used to refer to the area between the eyebrows, which is close to the nasion. Other related terms in anatomy include the nasion-point which helps to study the occlusal anomalies of jaws and dentofacial regions. Overall, while there may not be many synonyms for the term "nasion," there are related anatomical terms that can be used to describe this area of the face and forehead.