1. (n.) The quality or state of being stupid; extreme dullness of perception or understanding; insensibility; sluggishness.

2. (n.) Stupor; astonishment; stupefaction.

absurdity absurdness act of folly asininity battiness blockishness blunder boobishness boorishness bootlessness botch bovinity brainlessness buffoonery bungle cloddishness clownishness crackpottedness crankiness crassness craziness cretinism crudeness daffiness denseness density desipience dim-wittedness dimness doltishness dull-wittedness dullardism dullness dumb trick dumbness duncery eccentricity empty-headedness fatuity fatuousness faux pas folly foolery foolhardiness foolheadedness foolishness frivolity frivolousness gaffe giddiness goofiness grossness hebetude idiocy imbecility imprudence inanity indiscretion ineptitude insanity irrationality irresponsibility lethargy loutishness ludicrousness lumpishness lunacy madness mindlessness niaiserie ninnyism nonsense nugacity nuttiness oafdom oafishness obtuseness opacity queerness ridiculousness risibility sappiness screwiness senselessness silliness simpletonianism simplicity slowness sluggishness solecism sottise sottishness stolidity stupid thing thick-headedness thick-wittedness thoughtlessness triflingness triviality unteachability unwise step wackiness weak-mindedness weirdness witlessness wrongheadedness yokelism zaniness zanyism