Inversive geometry, also known as circle geometry, is a branch of Euclidean geometry that focuses on the properties of circles and inversions. However, there are a few synonyms for the term inversive geometry that may be more commonly used in various contexts. One alternative term is circular geometry, which emphasizes the central role of circles in this type of geometry. Another possible synonym could be projective geometry, as inversive geometry can be seen as a type of projective geometry in which the inversion is a particular type of projection. Other related terms might include transformation geometry, where inversions are seen as a type of geometric transformation, or simply Euclidean geometry, as inversions are one of many techniques used in this type of geometry.