Hi folks,
just stumbled upon this online thingy -- looks like it's not mentioned on EnglishForward yet.
http://www.visuwords.com/
Click on Random or enter a word at the top right corner. Enjoy! :-)
"Visuwords™ online graphical dictionary — Look up words to find their meanings and associations with other words and concepts. Produce diagrams reminiscent of a neural net. Learn how words associate."
"Visuwords™ uses Princeton University’s WordNet, an opensource database built by University students and language researchers."