Delusional Disorder: A psychiatric condition in which individuals cannot tell what is real from what is imagined; usually involves non-bizarre delusions centered around situations that could occur in real life.
Schizophrenia:A severe mental disorder characterized by disconnection from reality which results in hallucinations, delusions, thought disorders etc.
Anxiety Disorders:These are characterized by significant feelings of anxiety and fear, such as panic disorder, generalized anxiety disorder, specific phobias etc.