5 entries under understructure topic. ×
| cellar(noun, building, underbuilding) | |
| basement(noun, underbuilding) | |
| subterranean room(noun, expression, underbuilding) | |
| strong room(noun, expression, underbuilding) | |
| underground room(noun, expression, underbuilding) |
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| APA | Smart Define. (2015). attic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/attic/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "attic thesaurus" https://smartdefine.org/attic/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, attic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/attic/thesaurus/antonyms>. |
| MLA | Smart Define. "attic thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/attic/thesaurus/antonyms> |