A geometric solid is a three-dimensional shape that has specific properties such as flat faces, straight edges, and a consistent cross-section. The five most common geometric solids are the CONE (4 letters), PYRAMID (7 letters), PRISM (5 letters), CUBE (4 letters), CYLINDER (8 letters), and SPHERE (6 letters). A CONE is a solid with a circular base and a single curved side that tapers to a point. A PYRAMID is a solid with a polygonal base and triangular sides that meet at a point. A PRISM is a solid with two parallel faces and the same cross-section along its length. A CUBE is a solid with six square faces of equal size. A CYLINDER is a solid with two circular faces and a curved side. Finally, a SPHERE is a solid with a curved surface in which every point is equidistant from the center.