49 entries under noun topic. ×
| opening | |
| lacuna | |
| emptiness | |
| abysm | |
| antrum | |
| aperture | |
| blankness | |
| cavity | |
| cell | |
| chasm | |
| clearance | |
| crack | |
| cranny | |
| crevice | |
| den | |
| depression | |
| doorway | |
| exhaustion | |
| fossa | |
| gallery |
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| APA | Smart Define. (2015). congestion thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/congestion/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "congestion thesaurus" https://smartdefine.org/congestion/thesaurus/antonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, congestion thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/congestion/thesaurus/antonyms>. |
| MLA | Smart Define. "congestion thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/congestion/thesaurus/antonyms> |