Keyword Competitor Analysis tools will provide a way to track your search engine marketing performance of your website with your leading competitors of your website's keyword or search term. By entering a domain using SpyFu tool, you will get the entire report on the competitor’s top orgainc words, paid words, competitors. other than this, there are various tools are available. Refer this link http://www.seoservicesgroup.com/blo...are-your-website-with-your-competitors/17947/
semrush.com gives you some good free data of any sites organic rankings, only down side is that it updates slowly and the info is always about 1 month old, but I use it all the time to catch a sneak peak, cheers!
Don't use this sought off tool to check competitors kewords.. do it manually form google... and clear ur cache copy and mru files from registry..