I looked around for a few hours but couldn't find any wordlist. If you can find it you can contact me and I will add it to my site.
However, there is also an option called "Search 10.000" which lets you save a word list of up to 10.000 words inside your account. Then you can click the Search 10.000 button on the homepage of namecatch.com and access the results immediately. It will show you exact match search results if any of these domain terms is on auction at the moment. It also comes with email notifications. Of course these features are free like everything else on my site.
I don't want to turn your thread into advertisement of my site. If somebody has something specific about my site, you can always post here:
http://www.namepros.com/expired-domains/650424-namecatch-com-official-thread.html
By the way, somebody mentioned savespell.com. That is a good website and it is also free. But it has only dropping (pending delete) domains. Today I calculated again how may expired domains are pre release and how many are pending delete. As of 4 July 2010, 63% of all expired domains are auctioned during pre-release on partner dropcatcher sites (snapnames, namejet,) or on the registrar sites (godaddy, dynadot,...).
Only if a domain is not picked during pre-release, then it will reach pending delete. In other words there is 37% chance you will find a good quality dictionary domain in pending deletes and 63% chance you will find it in pre-release.
pending delete: also known as "deleting" and "dropping"
pre-release: also known as "expiring", partner registrar domain. Basically the registrars takes over your expired domain and auctions it a few weeks after expiry, long before it is supposed to drop.