The word "misshapen" means to be distorted or deformed in shape, so its antonyms are words that refer to being well-formed, symmetrical or proportional. Words like shapely, well-proportioned, well-formed, symmetrical, or well-structured can be used to describe things that are not misshapen. These words are often employed to describe the human form, especially in the context of fashion or art. In describing objects, terms like regular, even, uniform or proportional can be used. All of these antonyms serve as a useful counterweight to the negative connotations of "misshapen," emphasizing the positive qualities of things that are pleasing to the eye and harmonious in appearance.