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7
swamp(noun, flat, valley, quagmire)
5
flat(noun, adjective, valley, sunken)
1
wetland(noun, flat, swamp, valley)
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APASmart Define. (2016). lowland thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/lowland/thesaurus/synonyms
ChicagoSmart Define. 2016. "lowland thesaurus" https://smartdefine.org/lowland/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, lowland thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/lowland/thesaurus/synonyms>.
MLASmart Define. "lowland thesaurus" 1 March 2016. Web. 24 September 2026. <https://smartdefine.org/lowland/thesaurus/synonyms>