Synonyms|60Antonyms|3|Broader|0Narrower|0Related|13
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puzzling(adjective, evil, deep, mysterious, hidden)
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recondite(adjective, evil, deep, mysterious, hidden)
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satanic(adjective, evil, mysterious, threatening, nefarious)
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scowling(adjective, evil, mysterious, threatening, nefarious)
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secret(adjective, evil, deep, mysterious, unknown)
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sinful(adjective, evil, mysterious, threatening, nefarious)
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strange
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sulky(adjective, evil, mysterious, threatening, nefarious)
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sullen(adjective, evil, mysterious, threatening, nefarious)
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threatening(adjective, evil, mysterious, nefarious, spooky)
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unbeknown
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uncelebrated
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unidentified(adjective, secret)
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unknown
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unnamed
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unsung
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unwitting
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upset(adjective, evil, mysterious, threatening, nefarious)
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vile(adjective, evil, mysterious, threatening, nefarious)
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wicked(adjective, evil, mysterious, threatening, nefarious)
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APASmart Define. (2015). not known thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/not_known/thesaurus/synonyms
ChicagoSmart Define. 2015. "not known thesaurus" https://smartdefine.org/not_known/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, not known thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/not_known/thesaurus/synonyms>.
MLASmart Define. "not known thesaurus" 24 February 2015. Web. 26 September 2026. <https://smartdefine.org/not_known/thesaurus/synonyms>