The Visual Thesaurus is a nice online tool. It provides “maps” of connected words, and also has audible pronunciations. You can only try it free for a very limited time. After that it costs $2.95/month or $19.95/year. Here’s a screen shot of a trial search I did:
You can click on any of the words shown to move to a new map of verbal relationships or, as is shown here, rest your cursor on one of the line markers to see a more complete explanation of a term including how it would be used in context.
By the way, anytime you want to get a closer look at an image like the one above, just click on it, and you’ll be able to see if full screen.