Haskell has a type system that lets these things be directly useful in ways they cannot be in many other languages.
You can't, in Java, declare anything like "class Foo<F<T> extends Functor<T>>", or use a similar generic annotation on a method: you can't have an unapplied type-level function as an argument to another type-level function.
These things get a name in Haskell because they can be directly used as useful abstractions in their own right. And perhaps because Haskell remains very close to PL research.
You can't, in Java, declare anything like "class Foo<F<T> extends Functor<T>>", or use a similar generic annotation on a method: you can't have an unapplied type-level function as an argument to another type-level function.
These things get a name in Haskell because they can be directly used as useful abstractions in their own right. And perhaps because Haskell remains very close to PL research.