The word "aspherical" refers to an object or shape that is not spherical, meaning it is irregularly shaped. Antonyms for aspherical could be spherical, round or symmetrical. Spherical means having the shape of a sphere or a ball, evenly round in all directions. Round, on the other hand, does not necessarily imply complete symmetry, but rather a smooth and evenly curved shape. Symmetrical, means having or exhibiting symmetry or balanced proportions, which can also denote a precise and measured shape. While aspherical can be used to describe objects such as camera lenses, mirrors, or eyeglasses, spherical, round, and symmetrical all imply a sense of harmony, balance, and completeness.