What is another word for "parallelism"?

Roget's Thesaurus (1911) lists these synonyms for "parallelism": acclivity, alongside, angles, ant, ascent, bank, beach, bend, bevel, bias, cant, coextension, coextensive, correlation, crookedness, curve, declivity, descent, devexity, dip, distortion, downhill, easy, equidistance, equidistant, fall, gentle, gradient, ground, have, hill, inclination, intersect, lack, laterally, leaning, list, lurch, obliquity, orthogonal.