2
emptying
2
eruption(noun, egress, expulsion)
2
exhalation(discharge, waste, escape, beginning, emergence)
2
exit(noun, exit, egress)
2
issue(noun, exit, egress)
2
outcome(noun, exit, egress)
2
sewage
2
venesection
2
voidance
1
ablution
1
anhydration
1
arefaction
1
arising(discharge, waste, escape, beginning, emergence)
1
aspiration
1
bleeding
1
broaching
1
canalization
1
cleaning
1
cleaning out
1
cleanliness
10 years ago|5.1k views|share |citing 
APASmart Define. (2015). drainage thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/drainage/thesaurus/synonyms
ChicagoSmart Define. 2015. "drainage thesaurus" https://smartdefine.org/drainage/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, drainage thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/drainage/thesaurus/synonyms>.
MLASmart Define. "drainage thesaurus" 14 December 2015. Web. 24 September 2026. <https://smartdefine.org/drainage/thesaurus/synonyms>