| depression(noun, flat) | |
| hollow(noun, adjective) | |
| dent | |
| cavity | |
| dip | |
| basin | |
| bask | |
| bowl | |
| crater | |
| flat | |
| hole | |
| indentation | |
| asinine | |
| bastard | |
| bottom | |
| bottomland | |
| cavern | |
| cavernous | |
| concavity | |
| crack |
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| APA | Smart Define. (2015). hump thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/hump/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "hump thesaurus" https://smartdefine.org/hump/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, hump thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/hump/thesaurus/antonyms>. |
| MLA | Smart Define. "hump thesaurus" 19 June 2015. Web. 23 September 2026. <https://smartdefine.org/hump/thesaurus/antonyms> |