This tool http://www.seoautomatic.com/unique-tools/keyword-multiplier/ will multiply your chosen list of keywords into every variation possible for your PPC campaign, and can even be used to generate URL's for spinning software, linkbuilding services, or whatever you like.
We're not sure why Google doesn't offer something like this, but they don't! Watch this 2 1/2 minute video to see how easy it can be...