Word play is a goal of this blog so here are some links to keep us moving that way.
http://www.just-the-word.com/ is a quick but powerful tool for sorting through word patterns. It includes an option which allows you to view results in Wordle.
http://graphwords.com/ is another simple but effective visual thesaurus which, depending on your browser, will also let you save the results as an image.
Two great tools for generating class material or, better still, allowing your students do their own investigation.