Is there a difference between depression and depressive mood disorders?

Possibly. I am not sure how you are using the term "depressive mood disorders." depression (major depression) is one of the depressive disorders, but there are other types. So, my answer largely depends on how you are using your terms. In general, there is not a big difference between the two terms.
Symptom vs illness. Depression is one symptom of a variety of depressive mood disorders. These can include: major depression, dysthymia, adjustment disorder with depression. Also depression can be a symptom of other disorders that are not labeled depressive such as ptsd and bipolar.

Related Questions

What are mood disorders besides mania and depression?

Variety. Not a complete, but a brief description. Manic and depressive episodes referred to an episodes within the mood disorder.Roughly, bipolar is when person alternates between mania/hyponia and depression; for depression, you have to have a depressive episodes. Psychosis can accompany either mood disorder; there are also mood disorder when sx are not completely met for either depression or bipolar. Read more...
Moods. Organic mood do (cause is something physical such as thyroid disease, or medicines such as amphetamines) , mixed state (both dep. & mania) , or unspecified. Read more...
Cyclothymia also. I agree with drs. Fox and ali -- but want to add cyclothymia also in the mood disorders. It causes emotional ups and downs, but not as extreme as in bipolar disorder type i or ii. It is not very common but starts in teen years -- and stable periods last less than 2 months. Can bring about all kinds of difficulties, if untreated. Read more...