60 entries under certain topic. ×

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absolutely certain(expression, sure, guaranteed)
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audacious(noble, sure, courageous, guaranteed)
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bent(adjective, firm, determined, resolute)
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beyond doubt(expression, sure, guaranteed)
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cinched(sure, guaranteed)
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clear-cut(sure, guaranteed)
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clinched(sure, guaranteed)
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collected(sure, guaranteed)
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complacent(sure, guaranteed)
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composed(sure, guaranteed)
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confirmed(sure, guaranteed)
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cool(sure, self-assured, self-confident, guaranteed)
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dependable(sure, guaranteed)
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ensured(sure, guaranteed)
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guaranteed
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gung ho(expression, sure, guaranteed)
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gutsy(noble, sure, courageous, guaranteed)
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high(sure, self-assured, self-confident, guaranteed)
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imperturbable(sure, guaranteed)
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in the bag(expression, idiom, sure, guaranteed)
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APASmart Define. (2015). assertive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/assertive/thesaurus/synonyms
ChicagoSmart Define. 2015. "assertive thesaurus" https://smartdefine.org/assertive/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, assertive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/assertive/thesaurus/synonyms>.
MLASmart Define. "assertive thesaurus" 9 December 2015. Web. 22 September 2026. <https://smartdefine.org/assertive/thesaurus/synonyms>