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