Wordweb is a feature rich software that does much more than a paper dictionary or thesaurus. WordWeb is truly a Word Web - each set of synonyms is linked to other related sets. Look up "tree", click on the "Types" tab and you'll have a list of different types of tree. Click on "Part of" and WordWeb will tell you that a tree can be part of a "forest" or "wood".
In addition to all the free version features, the full Pro version includes 6000 more definitions and numerous extra features including:
Add custom web reference
Use custom glossaries
Wildcard word search
Full text definition search
Edit and add to the database
Find and solve anagrams
Search optional word lists
Over 3000 new entries and updates
Compatibility with Firefox 3
Various minor bug fixes/enhancements
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