Delusional Disorder: A mental disorder characterized by the presence of one or more delusions, such as persecutory delusions, without the presence of other psychotic symptoms like hallucinations.
Paranoia: An irrational and persistent feeling of being threatened, which can manifest in persecutory delusions and a general distrust of others.
Schizophrenia:A chronic and severe mental disorder that can involve positive symptoms like delusions, including persecutory delusions, as well as negative symptoms and cognitive impairments.