Then namespace it. As I said, there's nothing stopping you from having namespaces and modules.

    import Arithmetic (even)

    even :: Integer -> Bool
    even i

Also, you can call function calls messages or object operations or dictionary lookups, but I don't see the benefit in 99% of cases. I guess the dynamism may be useful in GUI code where it's not that hard to see if you're wrong and if you are wrong, nobody's world really ends. In most other cases functions are best described as having a formal mathematical definition so you can reason about them with some accuracy.