Hm, that tool I developed is something new, so I decided to mentioned it here. It should be in my signature , but anyway synonym based keyword tool. Feel free to post your comment.
I like the idea, but the design really needs work. Maybe simple reformatting is all that's needed. Something like a narrower table, better font, better color usage, etc.
The eye - naturally - likes a certain width of text before it loses the line it's on. That is, it will "forget" which line it's on and so when it comes to finding the next line, it stumbles a bit. Typically, this is about 60-80 characters long. The table you have now is 100% wide, and with little (no?) padding. Bring it down to 60% width, add some padding (space helps reading!), and maybe a different font. I like Verdana, but Arial works, Trebuchet works, even Times New Roman works at the right font-size/weight. See - all my comments are about layout. Nothing too technical, which is good