The site is Thinkmap Visual Thesaurus, and it offers many fun word-things to subscribers. Including a cool word of the day. Today's word is teutonic.
The Visual Thesaurus page I have to check out next is "Department of Word Lists." Just glancing, I see lists of Food Words, Wine Words, Spelling-bee Words, Jazz Words.... I could fall in love with this site..
There's a fee, but I think the site offers enough to make it worthwile.
Explore your inner word geek, and Enjoy!