Roget's Thesaurus: Entry 212 (Verticality)

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#212. Verticality. -- N. verticality; erectness &c. adj.; perpendicularity &c. 216a; 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. 216a.

Adv. vertically &c. adj.; up, on end; up on end, right on end; a plomb[Fr], endwise; one one's legs; at right angles.