Google Tools
This tool allows you to find out how a particular site ranks for multiple keywords. To enter more keywords select a larger number from the '# of keywords' field. A keyword must be entered in each keyword field. The minimum is two keywords. Also enter the address of the website in question. Then click the 'Go' button. The results show specific pages from the site you entered with page title and links to the page for each keyword. They also show the rank of that page in the Google database when that particular keyword is searched for.
Multiple Domain Keyword Ranking Checker