168 entries under cool topic. ×

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neglectful(adjective, calm, relaxed, casual)
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negligent(adjective, calm, relaxed, casual)
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no-nonsense(calm, dignified)
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proper(calm, dignified)
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seemly(calm, dignified)
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somber(calm, dignified)
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stately(calm, dignified)
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trifling(adjective, calm, relaxed, casual)
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APASmart Define. (2016). placid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/placid/thesaurus/synonyms
ChicagoSmart Define. 2016. "placid thesaurus" https://smartdefine.org/placid/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, placid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/placid/thesaurus/synonyms>.
MLASmart Define. "placid thesaurus" 29 February 2016. Web. 26 September 2026. <https://smartdefine.org/placid/thesaurus/synonyms>