Circular solid is a term used to describe a three-dimensional object that has a circular shape. Other synonyms for this term include cylinder, disc, wheel, sphere, ball, and round-shaped solid. A cylinder is a circular solid that has two parallel bases and a curved lateral surface. A disc is a circular thin piece that is always flat, while a wheel is a circular solid that rotates around an axis. A sphere is a completely round solid object that has no edges or corners, while a ball is a solid sphere used for play or sports. These synonyms are useful when describing the shape and structure of a circular solid, and each offers a unique perspective on its properties and uses.