29 entries under adjective topic. ×
| vertical(rough, level, upright) | |
| upright(rough, level, vertical) | |
| diagonal | |
| good | |
| inclined | |
| perpendicular | |
| plumb | |
| slanting | |
| sloped | |
| sloping | |
| abrupt | |
| oblique | |
| precipitous | |
| steep | |
| apt | |
| arduous | |
| bended | |
| biased | |
| colored | |
| coloured |
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| APA | Smart Define. (2015). horizontal thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/horizontal/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "horizontal thesaurus" https://smartdefine.org/horizontal/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, horizontal thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/horizontal/thesaurus/antonyms>. |
| MLA | Smart Define. "horizontal thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/horizontal/thesaurus/antonyms> |