Synonyms|865Antonyms|459|Broader|19Narrower|37Related|590
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immovability(stillness, motionlessness)
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impassibility
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impassiveness(indifference, insensitivity, unfeelingness)
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imperturbability(calmness, composure, unflappability)
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inanity(feebleness, boredom, insipidity, blandness)
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invariability(noun, routine, tedium, monotony, flatness)
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irksomeness(noun, melancholy, apathy, indifference, discontent)
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jadedness(noun, melancholy, apathy, indifference, discontent)
2
jejuneness(noun, excite, depression, lack, routine)
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joylessness(depression, tedium, monotony, dryness)
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leisureliness(noun, apathy, inactivity, lethargy, negligence)
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lentor
2
limpness(lethargy, torpor, inertness)
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long-windedness
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lukewarmness(noun, insensibility)
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lumpishness
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malaise(depression, melancholy, gloom, misery, anguish)
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mediocrity
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mindlessness
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misery(noun, trouble, worry, distress, sorrow)
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APASmart Define. (2016). dullness thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dullness/thesaurus/synonyms
ChicagoSmart Define. 2016. "dullness thesaurus" https://smartdefine.org/dullness/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dullness thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dullness/thesaurus/synonyms>.
MLASmart Define. "dullness thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/dullness/thesaurus/synonyms>