23 entries under upright topic. ×
| vertical(noun, adjective, smooth, sharp, solid) | |
| erect(verb, adjective, smooth, sharp, solid) | |
| steep(adjective, sharp, course, extreme, straight) | |
| straight(adjective, direct, right, level, straight) | |
| sheer(adjective, smooth, sharp, solid, level) | |
| precipitous(adjective, smooth, sharp, solid, level) | |
| up-and-down(adjective, variable, steep, vertical) | |
| standing(verb, adjective, firm, straight) | |
| abrupt(adjective, sharp, course, quick) | |
| stand-up(adjective, straight, erect, vertical) | |
| upstanding(adjective, firm, straight, erect) | |
| straight-up(adjective, sharp, course, straight) | |
| on end(expression, adjective, straight, erect) | |
| arrect(adjective, firm, straight) | |
| cocked(adjective, firm, straight, steep) | |
| elevated(adjective, sharp, firm, course, straight) | |
| raised(adjective, sharp, firm, course, straight) | |
| erectile(adjective, firm, straight) | |
| firm(adjective, straight) | |
| rigid(adjective, firm, straight) |
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| APA | Smart Define. (2015). perpendicular thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/perpendicular/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "perpendicular thesaurus" https://smartdefine.org/perpendicular/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, perpendicular thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/perpendicular/thesaurus/synonyms>. |
| MLA | Smart Define. "perpendicular thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/perpendicular/thesaurus/synonyms> |