Edge and Rim are both terms used to describe the outermost part of an object. Edge is typically used to refer to the sharp or pointed part of an object, while Rim is used to refer to the entire circumference of an object. Edge can also be used to refer to the boundary between two objects, while Rim is used to refer to the entire perimeter of an object. LIP is a three-letter word that is used to refer to the edge of a container or other object.