Synonyms|207Antonyms|86|Broader|3Narrower|0Related|367

54 entries under adjective topic. ×

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serious
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serviceable
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severe
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solid
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stable
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steadfast
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steady
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strict
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sturdy
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thorough
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thoroughgoing
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unmitigated
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utter
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vigorous
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APASmart Define. (2015). fallible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/fallible/thesaurus/antonyms
ChicagoSmart Define. 2015. "fallible thesaurus" https://smartdefine.org/fallible/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, fallible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/fallible/thesaurus/antonyms>.
MLASmart Define. "fallible thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/fallible/thesaurus/antonyms>