An angle finder is a useful tool to measure the angle between two lines or surfaces. However, it can be referred to by many other names too. Some common synonyms for an angle finder include a protractor, bevel gauge, clinometer, inclinometer, goniometer, and angle gauge. A protractor is a tool used for measuring angles in degrees, whereas a bevel gauge is used to transfer angles from one surface to another. On the other hand, a clinometer is a type of angle finder used for measuring slopes or inclines, while an inclinometer is a device used to measure the angle of inclination of an object or surface. A goniometer is another synonym which is used to measure angles between two body parts or joints.