"A visual dictionary, Visuwords shows a graphical representation of words and word relationships. Students can view word meanings and associations. Search for any word and immediately get word connections, find out which words are similar, an instance of, a substance of, a part of, a member of, a verb group, an opposite, a causes, entails, and offers suggestions for other words to see. Parts of speech are color coordinated so students can tell at a glance which part of speech the word is. When students hover the mouse over a word the definition pops up on the word." http://ilearntechnology.com/default
Check it out!!!!