The term 'donut-shaped' can be described by three crossword solutions: toric (5 letters), toroidal (8 letters), and TOROID (6 letters). Toric refers to a surface of revolution generated by a circle revolving around an axis that does not intersect the circle. Toroidal is a surface of revolution generated by a circle revolving around an axis that intersects the circle. Finally, TOROID is a surface generated by rotating a circle around an axis that lies in the same plane as the circle. All three terms refer to a donut-shaped object.