Emotional disturbance and Mental disorder

Emotional disturbance noun - Any mental disorder not caused by detectable organic abnormalities of the brain and in which a major disturbance of emotions is predominant.

Mental disorder and emotional disturbance are semantically related. In some cases you can use "Mental disorder" instead a noun phrase "Emotional disturbance".

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

Emotional disturbance and mental disorder are semantically related. Sometimes you can replace phrase "Emotional disturbance" with "Mental disorder", this phrases are similar.