60 entries under certain topic. ×

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indubitable(sure, guaranteed)
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insured(sure, guaranteed)
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irrefutable(sure, guaranteed, authoritative, unconditional)
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made certain(expression, sure, guaranteed)
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nailed down(expression, sure, guaranteed)
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on ice(expression, sure, guaranteed)
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puffed up(expression, sure, self-assured, self-confident)
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pumped up(expression, sure, guaranteed)
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racked(sure, self-assured, self-confident, guaranteed)
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rosy(sure, guaranteed)
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self-possessed(sure, self-assured, self-confident, guaranteed)
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set(firm, resolute, sure, decisive)
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settled(sure, guaranteed)
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sewed up(expression, sure, guaranteed)
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solid(sure, guaranteed)
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surefire(sure, guaranteed)
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undoubted(sure, guaranteed)
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unflappable(sure, guaranteed)
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unquestionable(sure, guaranteed)
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upbeat(sure, self-assured, self-confident, 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>