Synonyms|418Antonyms|8|Broader|0Narrower|0Related|44

202 entries under adjective topic. ×

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feline(taciturn, uncommunicative)
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foxy(sly, fraudulent)
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fraudulent
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guarded(cover, obscure, dark, equivocal)
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guileful(secretive, conspiratorial)
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hermetic(obscure, dark, unseen)
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hermetical(obscure, dark, isolated, unknowing)
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hole-and-corner(secret, spy, covert, recreant)
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hugger-mugger
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hushed(taciturn, uncommunicative)
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hypogeal
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hypogean
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hypogeous
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illegitimate(sly, fraudulent)
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illicit(sly, fraudulent)
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imperceivable(obscure, dark, isolated, unknowing)
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implied(cover, obscure, dark, equivocal)
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in chambers(expression, unknowing, taciturn, uncommunicative)
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in holes and corners(expression, idiom, adverb, sly)
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in privacy(expression, unknowing, taciturn, uncommunicative)
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APASmart Define. (2015). under cover thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/under_cover/thesaurus/synonyms
ChicagoSmart Define. 2015. "under cover thesaurus" https://smartdefine.org/under_cover/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, under cover thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/under_cover/thesaurus/synonyms>.
MLASmart Define. "under cover thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/under_cover/thesaurus/synonyms>