If you’re looking for an ice-cool on-line dictionary and thesaurus, give the Visuwords on-line graphic dictionary a spin. Among other things, it produces “diagrams reminiscent of a neural net” to show associations between words. When you hover your pointer over a word, it displays the word’s definition. Whether or not you find it useful, you’ll have fun playing with it. (Hat tip to Ken Davis.)
As with any thesaurus, please use it judiciously. No elegant variation, please.