paranoiac
Paranoiac is a term historically used to describe a person affected by paranoia or something relating to paranoia. As an adjective, it can mean characterized by suspiciousness or overly distrustful thinking. As a noun, paranoiac refers to a person who exhibits such mental states. In modern clinical usage, the term is largely considered obsolete or stigmatizing, with medical language favoring more precise expressions such as paranoid delusions, paranoid personality disorder, or psychotic disorders with paranoid features.
Etymology and sense: The word originates from Greek roots, with paranoia describing an abnormal mind state
Medical context: Paranoia is a symptom that can occur in several mental health conditions, most notably schizophrenia
Terminology and sensitivity: Because of potential stigma, the term paranoiac is rarely used in contemporary clinical
See also: paranoia, paranoid personality disorder, delusional disorder, psychotic disorders.