Based on Collins English Dictionary, Collins Official Scrabble Words is the most comprehensive Scrabble wordlist ever, including World English from Australia, Canada, New Zealand, South Africa, UK, and USA brought together in a single list. With over 276,000 permissible words, including inflected forms, this is the ideal training and adjudication tool for anyone playing Scrabble. Collins Official Scrabble Words is endorsed by Mattel and WESPA (the World English-Language Scrabble Players Association) and is the essential reference for all Scrabble players.