This is not the same thing - but it's helpful (and free) to find alternative words. Just type a word in the box - and then scroll down to see the results. It's the 'Word Check' tool at >> www.namepopper.com
"Can't think of any particular names to register ? Well just type in anything you can think of in this box. It will display all the search results form a dictionary of over 100,000 words as well as 1000's of occupational categories as well. Automatic links are created for all the search engine representations of that keyword as well as overture results and an automatic 1 click to see which domain names are already registered."