17
gutter(noun, drain, ditch, conduit)
13
cloaca(noun, drain, uncleanness, conduit)
9
channel(noun, line, water, way, course)
9
drain(noun, uncleanness, off, conduit)
8
conduit(noun, line, way, drain, means)
7
cesspool(noun, drain, uncleanness)
7
duct(noun, line, way, drain, means)
7
trench(noun, drain, conduit)
6
canal(noun, line, way, course, means)
5
culvert(noun, conduit)
5
ditch(noun, conduit)
5
sewerage
4
pipe(noun, course, drain, means, route)
4
gully(noun, conduit)
4
artery(noun, channel, conduit)
4
bog
3
aqueduct(noun, course, means, race, flow)
3
seamstress
3
septic tank(noun, expression, idiom, system, drain)
3
toilet(noun, uncleanness)
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APASmart Define. (2015). sewer thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sewer/thesaurus/synonyms
ChicagoSmart Define. 2015. "sewer thesaurus" https://smartdefine.org/sewer/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sewer thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sewer/thesaurus/synonyms>.
MLASmart Define. "sewer thesaurus" 1 December 2015. Web. 20 September 2026. <https://smartdefine.org/sewer/thesaurus/synonyms>