Mental disturbance and Mental illness

Mental disturbance noun - (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness.

Mental illness and mental disturbance are semantically related. In some cases you can use "Mental illness" instead a noun phrase "Mental disturbance".

Mental illness noun - Any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention.

Mental disturbance and mental illness are semantically related. You can use "Mental disturbance" instead a noun phrase "Mental illness".