Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

&c 216.1; right angle, normal; azimuth circle. wall, precipice, cliff. elevation, erection; square, plumb line, plummet. V. be vertical &c adj.; stand up, stand on end, stand erect, stand upright; stick up, cock up. render vertical &c adj.; set up, stick up, raise up, cock up; erect, rear, raise on its legs. Adj. vertical, upright, erect, perpendicular, plumb, normal, straight, bolt, upright; rampant; standing up &c v.; rectangular, orthogonal &c 216.1. Adv. vertically &c adj.; up, on end; up on end, right on end; a plomb [Fr.], endwise; one one's legs; at right angles.