What is another word for "rectangular"?

Roget's Thesaurus (1911) lists these synonyms for "rectangular": alongside, angle, angles, ant, azimuth, biquadrate, bolt, circle, cliff, cock, coextension, coextensive, correlation, divide, elevation, end, endwise, equidistance, equidistant, erect, erection, erectness, farthing, four, fourfold, fourth, fourthly, have, intersect, into, its, laterally, line, multiply, normal, one, orthogonal, parallel, parallelism, perpendicular.