Exactly this. When I write Scheme code, it trips me up when I have to re-spell variable names to avoid clashes. Experienced Scheme programmers don't find this difficult; they think it's weird to have to use funcall. It's just a function of what you're more used to.
It happens in C, when you have short function names. In the C internals of TXR, I have to be careful about using variable names like list or cons, because then those functions are not available.
A certain list accumulating macro calls the tail function. If I accidentally introduce a variable called tail where this macro is used, oops!
In typical C code, you're protected from clashes by using short variable names, and long function names.
