Synonyms for stupidity

noun

1. Dullness of mind

   stupor, stupefaction, apathy, slowness, inertia, heaviness, obtuseness, sluggishness, stolidity, feeble-mindedness, folly, weakness, silliness, nonsense, absurdity, imbecility, imprudence, lunacy, simplicity, idiocy, brainlessness, shallowness, weak-mindedness, fatuousness, fatuity, incapacity, short-sightedness, poverty of intellect, impracticality, addle-headedness, dullness of comprehension, puerility, senility, ineptitude, giddiness, thick-headedness, asininity, muddleheadedness, slowness, lack of judgment, injudiciousness, stupidness, slow-wittedness, bluntness, emptiness of mind, insensibility, doltishness, ignorance, lack of intelligence, mental deficiency, fatuity, boobishness*, nitwittedness*, dippiness*, battiness*, balminess*, goofiness*, baloney*, nertz*, bull*, hooey*, piffle*, phooey*, blatherskite*.

   Antonyms wisdom*, intelligence, judgment.

2. Extreme folly

   witlessness, senselessness, idiocy, imbecility, lunacy, nonsensicality, nonsense, indiscretion, ludicrousness, absurdity, asininity, silliness, simplicity, ineptitude, madness, infatuation, giddiness, rashness, frivolity, irrationality, damn-foolishness; see also carelessness.

   Antonyms acumen*, shrewdness, canniness.

3. A stupid act

   foolishness, folly, madness, imbecility, misguidedness; see also sense 2.