Final answer:
The outdated term for disorders involving unrealistic anxiety and related issues is neurosis. It's been replaced by more specific terms in modern diagnostic practice.
Step-by-step explanation:
The outdated term for disorders characterized by unrealistic anxiety and other associated problems is neurosis. This term has historically been used to describe a range of psychological conditions that result in significant distress but do not impact a person's grasp on reality, which differentiates it from psychosis. Neurosis included conditions such as anxiety disorders, phobias, and obsessive-compulsive disorder (OCD). However, this term is no longer in common use by mental health professionals and has been largely replaced by more specific disorder names and classifications in the Diagnostic and Statistical Manual of Mental Disorders (DSM), which is published by the American Psychiatric Association.