9
cesspool(noun, uncleanness, pit)
8
cesspit
7
sink(noun, uncleanness)
5
bog(noun, uncleanness, swamp, marsh)
5
quagmire(noun, marsh)
4
fen(noun, marsh)
4
marsh(noun, marsh)
4
morass(noun, marsh)
4
moss(noun, marsh)
4
sewer
4
slough(noun, marsh)
3
cistern
3
drain
3
marish
3
mud
3
pool
3
reservoir
3
septic tank(noun, system)
3
sough
3
swamp(noun, marsh)
<123458>
11 years ago|2.8k views|share |citing 
APASmart Define. (2015). sump thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sump/thesaurus/synonyms
ChicagoSmart Define. 2015. "sump thesaurus" https://smartdefine.org/sump/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sump thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sump/thesaurus/synonyms>.
MLASmart Define. "sump thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/sump/thesaurus/synonyms>