| rime | |
| rock-fill dam | |
| rupture | |
| sap | |
| scissure | |
| sea moat(expression, idiom) | |
| sea wall | |
| seam | |
| seawall | |
| security(noun, defense) | |
| sewer(noun, conduit) | |
| shield(noun, defense) | |
| shutter dam | |
| siphon(noun, conduit) | |
| slit | |
| slit trench | |
| slot | |
| sluice(noun, conduit) | |
| sough(noun, conduit) | |
| split |
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| APA | Smart Define. (2015). moat thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/moat/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "moat thesaurus" https://smartdefine.org/moat/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, moat thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/moat/thesaurus/synonyms>. |
| MLA | Smart Define. "moat thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/moat/thesaurus/synonyms> |