What is an American football pitch called?

Answer 1

The word is simply "field." It can also be described as a "gridiron" due to its marking into segments by yard lines.

An American football field can also be called a football pitch. In other parts of the world football is called soccer, thus a football pitch in a place like England would be a soccer field.

Answer 2

It is also called a "pigskin" although the ball has long been made of leather.