Geometric solids are three-dimensional shapes that have specific properties, such as length, width, and height. Polyhedra (9 letters) are a type of geometric solid with flat faces and straight edges. Tori (4 letters) are doughnut-shaped objects that are formed by revolving a circle around an axis that does not intersect the circle. Spheroids (9 letters) are ellipsoid-shaped objects that are formed by rotating an ellipse around an axis that does not intersect the ellipse.