dehog.com! I'd buy it if I had use for it. Also, a clever use of this data set would be to run it against the Google Search API, and order them by the number of results. Theoretically, more results = better word. Or, less results means easier SEO.
Re: List of 24,000 Available Brand Names (.com) For Your Startup
#31I don't have a way to hit the API that hard, if you do, would love to see the results!