What is another word for "circle"?

Roget's Thesaurus (1911) lists these synonyms for "circle": and, angle, angles, azimuth, bolt, cliff, cock, compromise, course, cross, cut, direct, elevation, end, endwise, erect, erection, erectness, even, golden, great, half, halfway, its, keep, line, make, mean, measure, medium, mezzo, middle, milieu, neutrality, normal, one, orthogonal, path, perpendicular, perpendicularity.