2 entries under adverb topic. ×

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indefinite(unmistakably, authentically, indisputably, veritably)
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uncertain(unmistakably, perceptibly, palpably)
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APASmart Define. (2015). without fail thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/without_fail/thesaurus/antonyms
ChicagoSmart Define. 2015. "without fail thesaurus" https://smartdefine.org/without_fail/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, without fail thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/without_fail/thesaurus/antonyms>.
MLASmart Define. "without fail thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/without_fail/thesaurus/antonyms>