Other than ground rule double what other terms can be used?

Answer 1

Automatic double. Technically, what is often called a ground rule double is not a ground rule double at all, but an automatic double.

All Baseball fields can have what are called ground rules. These are rules that are specific to that ball field. For example, a ball that lodges in the ivy on the outfield wall at Wrigley Field in Chicago is a double.

Then there are the rules that pertain to all ball parks and are described in the rule book. For example, any fair ball that bounds over an outfield fence is a double. This would be an automatic double, although it is commonly referred to as a ground rule double.