216a} parallelism; coextension†; equidistance†; similarity &c 17. Adj. parallel; coextensive; equidistant. Adv. alongside &c (laterally) 236. 216a. Perpendicularity — N. {ant. 216} perpendicularity, orthogonality; verticality, &c 212. V. be perpendicular, be orthogonal; intersect at right angles, be rectangular, be at right angles to, intersect at 90 degrees; have no correlation. Adj. orthogonal, perpendicular; rectangular; uncorrelated.