| 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: | together |
| Part of Speech: | adverb |
| Definition: | in a row |
Synonyms: |
consecutively, continually, continuously, in succession, night and day, on end, one after the other, running, successively, unintermittedly, without a break, without interruption |
Antonyms: |
separately |
| 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 |