Earlier quoted context omitted.
I'm not sure what you mean by word, but + vs. add() definitely have different levels of cognitive burden: Compare: (a + (b + c)) + d vs. add(add(a, add(b, c)), d) One is arithmetic, the other is polish notation.
Even polish notation benefits from +, IMO. + + a + b c d We can also (with mainstream OO syntax) make add infix and it's still ugly: a.add(b.add(c)).add(d)
> + + a + b c d
Yuck, really? I find that much less readable than "add(add(a, add(b, c)), d)"