There are some great ways of extending your vocabulary through playing other games than Scrabble. On Facebook a really useful game is Word Twist which is basically an anagramming game but fun because you get to challenge your friends. At the end you get to see which words you couldn't find in the six or seven letter anagram. On Facebook as well, its worth playing Scramble and of course Scrabulous . By the way, there is a seven-letter anagram in the game shown on the left. Know what it is?
Tips for playing Scrabble using the SOWPODS English and American dictionaries