Synonyms|436Antonyms|138|Broader|5Narrower|18Related|1.2k
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rotten
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shady
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shameful
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shoddy
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sinful
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sub-rosa
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surreptitious(adjective, secret, sneaky)
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taboo
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unapt
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unbecoming
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uncalled for(expression, ethical)
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unchartered
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unconfirmed
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unconstitutional
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underground(adjective, secret, subversive)
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unendorsed
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unethical
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unfair(good, honest)
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unfit
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unforgivable
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APASmart Define. (2015). authorized thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/authorized/thesaurus/antonyms
ChicagoSmart Define. 2015. "authorized thesaurus" https://smartdefine.org/authorized/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, authorized thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/authorized/thesaurus/antonyms>.
MLASmart Define. "authorized thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/authorized/thesaurus/antonyms>