Difference between Obtuseness and Dullness

OBTUSENESS vs DULLNESS: NOUN

Without sharpness of edge or point
A lack of visual brightness
The quality of lacking interestingness
The state or quality of being dull, in any sense of that word.
Synonyms Baldness, Heaviness, etc. (in style). See frigidity.
The state of being dull; slowness; stupidity; heaviness; drowsiness; bluntness; obtuseness; dimness; want of luster; want of vividness, or of brightness.
The quality of being uninteresting.
The lack of visual brilliance.
Bluntness.
Lack of sensibility
Without sharpness or clearness of edge or point
The quality of being slow to understand

Disingenuousness, Obliviousness, Incoherence, Indifference, Idiocy, Tactlessness, Incompetence, Callousness, Mendacity, Ineptitude, Stupidity, Arrogance, Cluelessness, Dulness, Dullness

Languor, Lassitude, Lifelessness, Boringness, Drabness, Monotony, Triteness, Boredom, Dreariness, Ennui, Banality, Blandness, Tedium, Bluntness, Obtuseness

Clumsiness, Dumbness, Obstinacy, Spinelessness, Naivete, Disingenuousness, Indifference, Idiocy, Tactlessness, Incompetence, Mendacity, Ineptitude, Stupidity, Arrogance, Dullness

Vapidity, Greyness, Bleakness, Lugubriousness, Plainness, Languor, Lassitude, Lifelessness, Drabness, Monotony, Triteness, Boredom, Ennui, Banality, Tedium

He did not languish in total obscurity, however, and was recalled from time to time both for his remarkable gifts and his obtuseness.
To uncover our deceptions and to recognize the lie in sin which leads to pride and moral obtuseness will not of itself deliver us.
Brexit, we are still forced to contend with the ongoing obtuseness of the Tory party Brexiteers.
Reacts to Appeal court judgement definition of sound judgement, obtuseness and witlessness are!