| Main Entry: | perpendicular |
| Part of Speech: | adjective |
| Definition: | at right angles to |
Synonyms: |
erect, horizontal, on end, plumb, sheer, stand-up, standing, steep, straight, straight-up, upright, vertical |
Antonyms: |
horizontal, level |
| Main Entry: | crosswise/crossways |
| Part of Speech: | adjective |
| Definition: | across, at an angle |
Synonyms: |
angular, aslant, at right angles, athwart, awry, contrariwise, crisscross, cross, crossing, diagonally, from side to side, horizontally, longways, on the bias, over, perpendicular, sideways, thwart, transversal, transverse, transversely, traverse, vertically |
| Main Entry: | erect |
| Part of Speech: | adjective |
| Definition: | straight up |
Synonyms: |
arrect, cocked, elevated, erectile, firm, perpendicular, raised, rigid, standing, stiff, upright, upstanding, vertical |
Antonyms: |
prone, prostrate |
| Main Entry: | plumb |
| Part of Speech: | adjective |
| Definition: | vertical |
Synonyms: |
erect, perpendicular, sheer, straight, straight up, up and down, upright |
| Notes: | a plum is any of numerous varieties of small to medium-sized round or oval smooth-skinned fruit with a single pit, while a plumb is a weight on the end of a line used to determine water depth or used to establish a true vertical |
Antonyms: |
flat, horizontal, level |
| Main Entry: | precipitous |
| Part of Speech: | adjective |
| Definition: | steep, falling sharply |
Synonyms: |
abrupt, arduous, craggy, dizzy, dizzying, high, perpendicular, precipitate, sharp, sheer |
Antonyms: |
gradual |
| Main Entry: | sheer |
| Part of Speech: | adjective |
| Definition: | abrupt, steep |
Synonyms: |
arduous, erect, headlong, perpendicular, precipitate, precipitous, sideling, upright |
Antonyms: |
moderate, slow |
| Main Entry: | steep |
| Part of Speech: | adjective |
| Definition: | extreme in direction, course |
Synonyms: |
abrupt, arduous, breakneck, declivitous, elevated, erect, headlong, high, hilly, lifted, lofty, perpendicular, precipitate, precipitous, prerupt, raised, sharp, sheer, straight-up |
Antonyms: |
gentle, mild, moderate |
| Main Entry: | straight |
| Part of Speech: | adjective |
| Definition: | aligned; not curved |
Synonyms: |
beeline, collinear, consecutive, continuous, direct, erect, even, horizontal, in a line, in a row, in line, inflexible, invariable, level, like an arrow, lineal, linear, near, nonstop, perpendicular, plumb, precipitous, rectilineal, rectilinear, right, running, sheer, short, smooth, solid, square, straightforward, successive, through, true, unbent, unbroken, uncurled, undeviating, undistorted, uninterrupted, unrelieved, unswerving, upright, vertical |
Antonyms: |
curved, indirect, twisted |
| Main Entry: | upright |
| Part of Speech: | adjective |
| Definition: | straight-up |
Synonyms: |
cocked, end on, end up, erect, on end, perpendicular, plumb, raised, sheer, stand-up, standing, steep, straight, upended, upstanding, upward, vertical |
Antonyms: |
fallen, lying, prone |
| Main Entry: | vertical |
| Part of Speech: | adjective |
| Definition: | upright |
Synonyms: |
bolt upright, cocked, erect, on end, perpendicular, plumb, sheer, steep, straight-up, up-and-down, upward |
Antonyms: |
horizontal, prone |