Actually, that is the next part of what I'm going to do.
However, since I am only interested in words from the English dictionary, it doesn't matter so much whether John's is counted or not as John. (export to csv, open in spreadsheet).
I would however be extremely interested in knowing how you would change this, as I will get that kind of issue with contractions (it's, wouldn't, etc. that I had planned on tackling with a spreadsheet, (but then again, I am trying to minimize user interaction)