Synonyms of obtuseness

2 Syllables
stupor, sciolism, slowness, weakness
3 Syllables
idiocy, fatuousness, sluggishness, battiness, brainlessness, doltishness, stupidness, apathy, nescience, nonsense, fatuity, lunacy, shallowness, silliness
4 Syllables
simplicity, puerility, stolidity, nitwittedness, thick-headedness, weak-mindedness, imprudence, stupidities, absurdity, unconsciousness, stupefaction, ignorance, obliviousness, philistinism, thickheadedness, stupidity, half-knowledge
5 Syllables
asininity, ineptitude, injudiciousness, feeble-mindedness, illiteracies, feeblemindedness, incapacity, imbecility, incomprehension, unawareness, empty-headedness, illiteracy, unscholarliness
6 Syllables
insensibility, unfamiliarities, unfamiliarity