denseness

the quality or state of lacking intelligence or quickness of mind complained about the indefensible denseness of the shipping clerks who had misplaced his order Synonyms boneheadedness, brainlessness, stupidity, density, dim-wittedness, doltishness, dopiness, dorkiness, dullness (also dulness), dumbness, fatuity, foolishness, gormlessness [chiefly British], mindlessness, oafishness, obtuseness, senselessness, simpleness, slowness, stupidness, thickness, vacuity, weak-mindedness, witlessnessRelated Words feeblemindedness, simplemindedness; absurdity, asininity, balminess, craziness, daftness, dippiness, dottiness, fatuousness, folly, idiocy, inaneness, inanity, insanity, lunacy, madness, nincompoopery, nonsensicalness, nuttiness, preposterousness, silliness, simplicity, wackiness, zaniness; fallacy, irrationality, unreasonableness; mental deficiency, mental retardationNear Antonyms acumen, alertness, astuteness, discernment, insight, judgment (or judgement), perception, percipience, perspicacity; sagacity, sageness, sapience, wisdom, wit; logicality, logicalness, rationality, rationalness, reasonableness, soundness, validityAntonyms braininess, brightness, brilliance, cleverness, intelligence, keenness, quickness, quick-wittedness, sharpness, smartness