70 entries under still topic. ×

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quiescent(adjective, quiet, cool, smooth)
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reposeful(adjective, quiet, cool, peaceful)
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reposing(adjective, quiet, cool, peaceful)
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rural(adjective, quiet, cool, peaceful)
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slow(adjective, quiet, cool, peaceful)
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smooth(adjective, quiet, cool, peaceful)
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soothing(adjective, quiet, cool, peaceful)
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stormless(adjective, quiet, cool, peaceful)
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waveless(adjective, quiet, cool, peaceful)
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windless(adjective, quiet, cool, peaceful)
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APASmart Define. (2011). cool as cucumber thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/cool_as_cucumber/thesaurus/synonyms
ChicagoSmart Define. 2011. "cool as cucumber thesaurus" https://smartdefine.org/cool_as_cucumber/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2011, cool as cucumber thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/cool_as_cucumber/thesaurus/synonyms>.
MLASmart Define. "cool as cucumber thesaurus" 24 May 2011. Web. 30 September 2026. <https://smartdefine.org/cool_as_cucumber/thesaurus/synonyms>