Paranoia n. : Mental derangement; insanity.

Example:
What is the difference between intuition and Paranoia?

Taxonomy
Fusion paranoia, delusions, belief, fear, free encyclopedia, thought process, F22, Megalomaniac, psychology, thinks, Kraepelin, delusional beliefs, Delusional disorder, Freeman, language, excessive anxiety, History, Further reading.

Defination from the web:
Paranoia is a thought process characterized by excessive anxiety or fear, often to the point of irrationality and delusion. ... An example of paranoia, however, would be fear that while watching an American Football game, the team huddle was talking about the person affected. ...