Nice, but changing the words doesn't help you at all. It's just a way of avoiding your stutter instead of facing the fact that you are indeed a stutterer. I had the same problem but I am forcing myself to not change words anymore as it can really help you on the way of accepting your stutter. A big part of blocks occur because of psychological factors like shame, and to try to avoid words or sounds means that you probably are ashamed of your stutter.