24 entries under adjective topic. ×
| horizontal | |
| inclined | |
| flat | |
| prostrate(flat, horizontal) | |
| unerect | |
| level(rough, irregular, broken, indefinite) | |
| prone | |
| parallel | |
| plane(level, horizontal) | |
| fair | |
| flaccid | |
| fluent | |
| gloomy | |
| impassive | |
| inert | |
| innocuous | |
| languid | |
| lank | |
| lax | |
| low |
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| APA | Smart Define. (2016). vertical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/vertical/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "vertical thesaurus" https://smartdefine.org/vertical/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, vertical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/vertical/thesaurus/antonyms>. |
| MLA | Smart Define. "vertical thesaurus" 15 March 2016. Web. 23 September 2026. <https://smartdefine.org/vertical/thesaurus/antonyms> |