Need help grouping by similar words in second column

First off I'd like to thank the knowledgeable people here who take time to help guys like me out. It is really appreciated

images below

http://img219.imageshack.us/img219/738/excel1.jpg
http://img32.imageshack.us/img32/499...4nov191730.jpg

What I am trying to do is insert a blank row and also the ~ symbol (or any character) at the point that the words change in the second column.

I hope it's apparent what I need to do here, if any questions please ask. It should be obvious after looking at the pics.

I have a list of over 100k keywords to sort this way and doing it manually will be a chore.

Please help if you can.
Thanks!