Can you be more precise in your question? I suppose you mean kerning of fonts, but indicating what is your exact need might bring better answers.

That's not a syntax question, BTW, although it is hard to classify...

Well, I was dumb (and non-native English speaker... ), apparently kerning applies only to fonts, indeed.
But I asked for a use case.
Basically, you want to display text with kerning enabled, right?

Indeed, if I try something like:
Code:

void setup()
{
  size(500, 200);
  PFont font = createFont("Times New Roman", 72);
  textFont(font);
  text("AV TA' Wa", 10, 60);
  text("AA TT. WV", 10, 120);
} 

it doesn't look very nice.

Some people asked the same question for Java.
I see that it is possible since Java 1.6.
There were workarounds for previous versions.

Apparently, injecting that in Processing will be hard, unless rewriting the text-related functions...