15 entries under doubtfully topic. ×

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absolutely(adverb, unmistakably, perceptibly, palpably)
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categorically(adverb, unmistakably, perceptibly, palpably)
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come hell or high water(expression, idiom, adverb, unmistakably)
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decisively(adverb, unmistakably, uncertainly, perceptibly)
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no ifs ands or buts(expression, idiom, adverb, qualified, indefinite)
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no strings attached(expression, idiom, adverb, qualified, indefinite)
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on the button(expression, idiom, adverb, false, careless)
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on the money(expression, idiom, adverb, false, careless)
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straight out(expression, adverb, qualified, indefinite, unmistakably)
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sure as can be(expression, idiom, adverb, unmistakably)
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sure as hell(expression, idiom, adverb, unmistakably)
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sure enough(expression, adverb, dubious, mental, unmistakably)
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unambiguously(adverb, unmistakably, perceptibly, palpably)
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undoubtedly(adverb, unmistakably, perceptibly, palpably)
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very thing(expression, adverb, unmistakably, perceptibly)
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APASmart Define. (2016). uncertain thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/uncertain/thesaurus/antonyms
ChicagoSmart Define. 2016. "uncertain thesaurus" https://smartdefine.org/uncertain/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, uncertain thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/uncertain/thesaurus/antonyms>.
MLASmart Define. "uncertain thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/uncertain/thesaurus/antonyms>