Welcome to Webmaster World!
There are some sites that will let you do this.
I just searched for the string "photo", and the search returned 1,287,529 registered .com, .net, .org, .info, .biz and .us domains, with a character length of up to 25 characters.
I'll send you a sticky mail with the search site.
Maybe someone knows of a search site that will retrieve all non-TLDs and/or longer domain name lengths.