Depressive disorder and Exogenous depression

Depressive disorder noun - A state of depression and anhedonia so severe as to require clinical intervention.

Exogenous depression and depressive disorder are semantically related. In some cases you can replace phrase "Exogenous depression" with "Depressive disorder", this phrases are similar.

Exogenous depression noun - An inappropriate state of depression that is precipitated by events in the person's life (to be distinguished from normal grief).

Depressive disorder and exogenous depression are semantically related. You can use "Depressive disorder" instead a noun phrase "Exogenous depression".