Catatonia and Schizophrenic disorder

Catatonia noun - A form of schizophrenia characterized by a tendency to remain in a fixed stuporous state for long periods; the catatonia may give way to short periods of extreme excitement.

Schizophrenic disorder and catatonia are semantically related. In some cases you can use "Schizophrenic disorder" instead a noun "Catatonia".

Schizophrenic disorder noun - Any of several psychotic disorders characterized by distortions of reality and disturbances of thought and language and withdrawal from social contact.

Catatonia and schizophrenic disorder are semantically related. Sometimes you can replace term "Catatonia" with "Schizophrenic disorder", this terms are similar.