WordBook is a comprehensive English dictionary plus much more of a Thesaurus. It provides great features and contents to discover English. It has impressive 150,000 entries with total 1.8 million words. The content is equivalent to a huge reference book of 1,800 pages. Definitions include usage samples and synonyms. It provides word links in every definition. You can follow the links to see its synonyms, antonyms, hyponyms, and derivationally related forms. Think of a semantic graph in which you can browse to discover the whole new vocabulary. WordBook includes the Speech Engine to speak the words and definitions within the dictionary or text from other applications.
Version 3.6 includes Speech Engine to speak out the words and read text from other applications.