dementia (n.)

• aberration
• abnormality
• alienation
• craziness
• daftness
• dementedness
• derangement
• disorientation
• distraction
• folie
• furor
• insaneness
• insanity
• irrationality
• lunacy
• madness
• mania
• oddness
• possession
• queerness
• rabidness
• senselessness
• sickness
• strangeness
• unbalance
• unsoundness