62 entries under noun topic. ×

11
drain(exit, egress)
9
outflow(discharge, waste, beginning, exit)
7
evacuation(ejection, egress, expulsion)
6
efflux(discharge, waste, beginning, exit)
6
runoff(waste, exit, overflow, sewage)
5
seepage(expulsion, leakage)
4
egress(exit, egress)
4
excretion(egress, expulsion)
3
sewerage(cleanness, seepage)
3
dehydration
3
emanation(discharge, beginning, egress, emergence)
3
exhaust
3
exhaustion
3
exudation(discharge, waste, escape, beginning)
3
outlet
3
waste
2
bilge(waste, sewage, seepage)
2
clearing
2
culvert
2
effluent(discharge, waste, escape, beginning)
10 years ago|5.1k views|share |citing 
APASmart Define. (2015). drainage thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/drainage/thesaurus/synonyms
ChicagoSmart Define. 2015. "drainage thesaurus" https://smartdefine.org/drainage/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, drainage thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/drainage/thesaurus/synonyms>.
MLASmart Define. "drainage thesaurus" 14 December 2015. Web. 28 September 2026. <https://smartdefine.org/drainage/thesaurus/synonyms>