| origin(discharge, waste, escape, beginning, emergence) | |
| origination(discharge, waste, escape, beginning, emergence) | |
| outfall | |
| outflowing | |
| outgo(noun, exit) | |
| percolation | |
| pipetting | |
| proceeding(discharge, waste, escape, beginning, emergence) | |
| pumping | |
| radiation(discharge, waste, escape, beginning, emergence) | |
| rejection(noun, expulsion) | |
| removal | |
| secretion(noun, expulsion) | |
| sewer | |
| siphoning | |
| spout(noun, exit) | |
| springing(discharge, waste, escape, beginning, emergence) | |
| sucking | |
| suction | |
| unloading |
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| APA | Smart Define. (2015). drainage thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/drainage/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "drainage thesaurus" https://smartdefine.org/drainage/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, drainage thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/drainage/thesaurus/synonyms>. |
| MLA | Smart Define. "drainage thesaurus" 14 December 2015. Web. 24 September 2026. <https://smartdefine.org/drainage/thesaurus/synonyms> |