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I would think there would have to be a tool out there that pairs search terms by words they have in common... anyone know of any?
Your not going to find a tool that is going to do this for you. Your only going to find tools that help you out. There is just too many decisions a human has to make.
Ad groups; home, replace, window
I can then write ads based on the keywords and know where they are. I may be missing something but it is working for me.