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

60 entries under adjective topic. ×

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bland
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cheerless
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cloudy
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dense
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dier
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dismal
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drab
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dreary
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dull
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fatter
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feebler
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flat
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grosser
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heavy
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hollower
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humdrum
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inactive
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inert
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lacklustre
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leaden
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APASmart Define. (2015). duller thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/duller/thesaurus/synonyms
ChicagoSmart Define. 2015. "duller thesaurus" https://smartdefine.org/duller/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, duller thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/duller/thesaurus/synonyms>.
MLASmart Define. "duller thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/duller/thesaurus/synonyms>