162 entries under smooth topic. ×

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wimpy(adjective, dull, weak, gentle)
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amiable(adjective, calm, kind, soft)
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compassionate(adjective, calm, kind, soft)
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complaisant(adjective, calm, kind, soft)
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deferential(adjective, calm, kind, soft)
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easygoing(adjective, calm, kind, soft)
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flat as a pancake(expression, adjective, idiom, even)
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forbearant(adjective, calm, kind, soft)
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forgiving(adjective, calm, kind, soft)
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good-humored(adjective, calm, kind, soft)
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good-natured(adjective, calm, kind, soft)
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good-tempered(adjective, calm, kind, soft)
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humane(adjective, calm, kind, soft)
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indulgent(adjective, calm, kind, soft)
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meek(adjective, calm, kind, soft)
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merciful(adjective, calm, kind, soft)
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mild-mannered(adjective, calm, kind, soft)
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obeisant(adjective, calm, kind, soft)
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obliging(adjective, calm, kind, soft)
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peaceable(adjective, calm, kind, soft)
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APASmart Define. (2016). flat thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/flat/thesaurus/synonyms
ChicagoSmart Define. 2016. "flat thesaurus" https://smartdefine.org/flat/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, flat thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/flat/thesaurus/synonyms>.
MLASmart Define. "flat thesaurus" 1 March 2016. Web. 23 September 2026. <https://smartdefine.org/flat/thesaurus/synonyms>