128 entries under adjective topic. ×

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not harmonious
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off-pitch
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opposing(different, conflicting, differing, deviating)
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opposite(different, contrary, conflicting, atypical)
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out of keeping
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pitiless(severe, bleak, stark, austere)
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poles apart(expression, different, contrary, conflicting)
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punitive(severe, bleak, stark, austere)
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relentless(severe, bleak, stark, austere)
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rude(severe, bleak, stark, austere)
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ruthless(severe, bleak, stark, austere)
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separate(different, conflicting, differing, deviating)
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sour note
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stark(severe, bleak, austere, inhospitable)
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stern(severe, bleak, stark, austere)
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stringent(severe, bleak, stark, austere)
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tough(severe, bleak, stark, austere)
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unalike(different, contrary, conflicting, atypical)
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uncivil(severe, bleak, stark, austere)
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unequal(different, contrary, conflicting, atypical)
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APASmart Define. (2015). off-key thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/off-key/thesaurus/synonyms
ChicagoSmart Define. 2015. "off-key thesaurus" https://smartdefine.org/off-key/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, off-key thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/off-key/thesaurus/synonyms>.
MLASmart Define. "off-key thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/off-key/thesaurus/synonyms>