Synonyms|648Antonyms|154|Broader|16Narrower|18Related|740
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unashamed
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uncalled for(expression, clean)
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unconcerned
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unconsidered
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undiscriminating(adjective, careless, unobservant)
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uninformed
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uninterested
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unready
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unsafe
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unselective
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unsuspecting
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vacant
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visionless
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wanton(adjective, careless)
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APASmart Define. (2016). observant thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/observant/thesaurus/antonyms
ChicagoSmart Define. 2016. "observant thesaurus" https://smartdefine.org/observant/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, observant thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/observant/thesaurus/antonyms>.
MLASmart Define. "observant thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/observant/thesaurus/antonyms>