Overview and Rundown

Overview noun - A general summary of a subject.

Rundown and overview are semantically related in survey topic. In some cases you can use "Rundown" instead a noun "Overview", when it comes to topics like summary.

Rundown noun - A concluding summary (as in presenting a case before a law court).

Overview and rundown are semantically related in summary topic. You can use "Overview" instead a noun "Rundown", if it concerns topics such as analysis.