Synonyms|1.1kAntonyms|207|Broader|17Narrower|22Related|212
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begrudging
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belt up
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biased
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bigoted
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bland
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blinking
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blockaded
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blocked
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certain
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chary
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circuitous
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civil
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clam up
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clandestine
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classified
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clogged
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close-mouthed
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close-up
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close at hand
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close in
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APASmart Define. (2015). open up thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/open_up/thesaurus/antonyms
ChicagoSmart Define. 2015. "open up thesaurus" https://smartdefine.org/open_up/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, open up thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/open_up/thesaurus/antonyms>.
MLASmart Define. "open up thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/open_up/thesaurus/antonyms>