Synonyms|800Antonyms|156|Broader|29Narrower|4Related|1.8k
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uncertain
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unclarified
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unclouded
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undecipherable
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underground
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underhand
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underhanded
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undisclosed
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undiscovered
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unfathomable
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unimagined
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unintelligible
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unknowable
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unknown
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unnoticed
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unobserved
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unreadable
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unseen
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unthought-of
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veiled
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APASmart Define. (2016). patent thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/patent/thesaurus/antonyms
ChicagoSmart Define. 2016. "patent thesaurus" https://smartdefine.org/patent/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, patent thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/patent/thesaurus/antonyms>.
MLASmart Define. "patent thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/patent/thesaurus/antonyms>