Cruel words

So, I have come to the conclusion that the two most cruel words in the English language are:

Stutter and Lisp.

Try and imagine someone with either trying to tell people about their condition. So cruel.

Then I thought - what about people who can't say their Rs. A quick Google search turned up yet another cruel word - Rhotacism. (http://en.wikipedia.org/wiki/Rhotacism)

I'm sure some speach therapists are laughing somewhere.