This is an extract of the most popular keywords out of 4M entries which was revealed accidentally by Yahoo some time ago. Enjoy. http://www.file-upload.net/download-2028768/popkw.txt.html Edit: This is an extract of Y database of 33M search queries resulting in 4M different keywords users searched for. The file above contains the 110k most popular search queries - unfiltered and with some crap, but still and originally user's search queries. I use it for HRefer as words list, but there are for sure other use cases. You might be tempted to use that list to search for new keywords for your website. Due to the age of that list (probably 3 years), this won't necessarily work well.