Similar words: fullness, illness, wellness, stillness, shrillness, mental illness, successfulness, coolness. Meaning: ['dʌlnɪs] 
n. 1. the quality of being slow to understand 2. the quality of lacking interestingness 3. a lack of visual brightness 4. lack of sensibility 5. without sharpness or clearness of edge or point.
n. 1. the quality of being slow to understand 2. the quality of lacking interestingness 3. a lack of visual brightness 4. lack of sensibility 5. without sharpness or clearness of edge or point. 
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31. Under normal examination conditions the hepatic dullness extends to the intercostal cartilage.
32. They were given to day-dreaming, indecision, plain dullness(1), and they showed no promise of being doctor, lawyer or Indian chief.
More similar words: fullness, illness, wellness, stillness, shrillness, mental illness, successfulness, coolness, foulness, evilness, awfulness, cruelness, frailness, usefulness, joyfulness, sinfulness, carefulness, casualness, lawfulness, restfulness, bashfulness, forgetfulness, naturalness, wakefulness, fearfulness, gradualness, wastefulness, hatefulness, helpfulness, specialness.