To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Babylon Dictionary Word Search by Monty_Stegall
Rated 5 out of 5 stars
Another possibility is to use Onelook.com. This looks up words in over 1000 dictionaries and encyclopedias. If you don't know the word describe it here.
http://www.onelook.com/reverse-dictionary.shtml
To create your own collections, you must have a Mozilla Add-ons account.