8
bogs(noun, wastes, deserts, mires, swamps)
7
swamps(noun, wastes, messes, deserts, muddles)
5
marshes(noun, swamp, wastes, deserts, swamps)
5
quagmires(noun, wastes, messes, deserts, swamps)
4
mires(noun, messes, muddles, swamps, bogs)
3
swamplands(noun, marshes)
2
glades(noun, marshes)
2
marshlands
2
sloughs
1
ablutions
1
backwaters
1
bottoms(noun, marshes)
1
fends
1
flats
1
lowlands(noun, swamps, marshes)
1
moors
1
morasses(noun, messes, muddles, mires, swamps)
1
oozes(noun, swamps)
1
plains
1
ponds
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APASmart Define. (2015). fens thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/fens/thesaurus/synonyms
ChicagoSmart Define. 2015. "fens thesaurus" https://smartdefine.org/fens/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, fens thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/fens/thesaurus/synonyms>.
MLASmart Define. "fens thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/fens/thesaurus/synonyms>