wordflex and mindmaps

Mindmapping is a great way to work with words:
Mind map - Wikipedia
How to Use Mind Maps to Unleash Your Brain's Creativity and Potential
How to teach mind mapping and how to make a mind map | inspiration.com
The Student's Guide to Mind Mapping - Focus
Mind Mapping - How to Mind Map

And a very good product for your ipad/tablet is:
Wordflex - Brain-friendly English dictionary for your iPad, with content from Oxford University Press

With a useful video or two:
Wordflex Touch: Stunning Visual Dictionary for iPad - YouTube



Wordflex full demonstration (7 minutes) - YouTube

But you can create your own!
How to Build a Mind Map in Microsoft Word
Download - FreeMind
Freemind Free Mind Mapping Software Tutorial Mind Map - YouTube
.
.
.