- Definitions|1
- Thesaurus|319
- Abbreviations|0
39 entries under noun topic. ×
| lowland(adjective, upland) | |
| depression | |
| prairie | |
| savanna | |
| base | |
| basin | |
| bog | |
| bottom(drop, base) | |
| canyon | |
| champaign | |
| common | |
| decline | |
| decrease(drop, base) | |
| depth(drop, base) | |
| ditch(decline, ton, tor, hillside) | |
| downs | |
| drop | |
| fall | |
| flat(drop, base) | |
| grassland |
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| APA | Smart Define. (2015). highland thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/highland/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "highland thesaurus" https://smartdefine.org/highland/thesaurus/antonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, highland thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/highland/thesaurus/antonyms>. |
| MLA | Smart Define. "highland thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/highland/thesaurus/antonyms> |