- Definitions|1
- Thesaurus|198
- Abbreviations|0
| reason(noun, support, substance, authority, basis) | |
| rest(noun, base, bottom, floor) | |
| resting place(noun, expression, balance, foundation, basis) | |
| riverbed(noun, bottom, floor) | |
| root word(expression, idiom) | |
| seabed(noun, bottom, floor) | |
| seating(noun, balance, foundation, basis, warrant) | |
| settlement(noun, balance, foundation, basis, warrant) | |
| shadow | |
| shank | |
| stability(noun, balance, foothold) | |
| stay(noun, support, substance, authority, basis) | |
| substance(basis, grounds) | |
| tail end(expression, idiom) | |
| warrant(noun, balance, foundation, basis, stability) |
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| APA | Smart Define. (2015). understructure thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/understructure/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "understructure thesaurus" https://smartdefine.org/understructure/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, understructure thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/understructure/thesaurus/synonyms>. |
| MLA | Smart Define. "understructure thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/understructure/thesaurus/synonyms> |