Synonyms|124Antonyms|52|Broader|0Narrower|0Related|112

60 entries under adjective topic. ×

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lifeless
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lower
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lustreless
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matted
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monotonous
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muddier
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nonresonant
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obscurer
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obtuse
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paler
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plainer
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quieter
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shallower
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simpler
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slack
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slow
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sluggish
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soberer
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staler
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torpid
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APASmart Define. (2015). duller thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/duller/thesaurus/synonyms
ChicagoSmart Define. 2015. "duller thesaurus" https://smartdefine.org/duller/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, duller thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/duller/thesaurus/synonyms>.
MLASmart Define. "duller thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/duller/thesaurus/synonyms>