Calls itself an “online graphical dictionary and thesaurus.” You can look up a word and you’ll get a graph that shows you the word’s meaning(s) and the way it associates with other words or concepts. Some cool interactive stuff lets you see definitions and move different “nodes” around.
Visuwords™ uses Princeton University’s WordNet, an opensource database built by University students and language researchers. Combined with a visualization tool and user interface built from a combination of modern web technologies, Visuwords™ is available as a free resource to all patrons of the web.
For example, the word grammar:
Go to Visuwords to check out the interactivity of it. Like I said, coolest thing all week.
Hat tip to David.