| witlessness(noun, sense, behavior, thinking, brain) |
| obtuseness(noun, sense, behavior, thinking, brain) |
| simplicity(noun, sense, behavior, thinking, brain) |
| thickness(noun, sense, behavior, thinking, brain) |
| craziness(noun, behavior, thinking, cognition) |
| foolishness(noun, behavior, thinking, cognition) |
| inaneness(noun, behavior, thinking, cognition) |
| madness(noun, behavior, thinking, cognition) |
| senselessness(noun, behavior, thinking, cognition) |
| slow-wittedness(noun, sense, brain, human) |
| stupidity(noun, sense, brain, human) |
| unconsciousness(noun, sense, brain, human) |
| absurdity(noun, behavior, thinking, cognition) |
| absurdness(noun, behavior, thinking, cognition) |
| asininity(noun, behavior, thinking, cognition) |
| balminess(noun, behavior, thinking, cognition) |
| blunder(noun, behavior, thinking, cognition) |
| boneheadedness(noun, behavior, thinking, cognition) |
| brainlessness(noun, behavior, thinking, cognition) |
| buffoonery(noun, behavior, thinking, cognition) |