Isogon is a term used in geometry to refer to a polygon with equal angles between the sides. However, there are a few other terms that can be used as synonyms for isogon. One of them is equiangular polygon, which has equal angles between all its sides. Another term is equilateral polygon, which has equal sides but may not necessarily have equal angles. Finally, there is regular polygon, which is a polygon with both equal sides and equal angles. These terms are all closely related and help describe the properties of different polygons in geometry.