I’ve been pondering about the C# and CIL type system today and I’ve started to wonder why static classes are considered classes. There are many ways in which they are not really
It's a class as far as the CLR is concerned. It's just syntactic sugar in the C# compiler, basically.
I don't think there would be any benefit in adding a different name here - they behave mostly like classes which just have static methods and can't be constructed, which is usually the kind of class which became a static class when we moved from C# 1 to C# 2.
Bear in mind that if you want to create a new name for it, that probably means a new keyword too...