Funster: More Vocabulary Lessons
Play great online games against other online opponents from around the world! In the Word-Know-It-All you try to guess the correct definition of a word before the other players do. In Whats-In-A-Name you must try to make up as many real words using a word or phrase supplied by the computer.

A Year’s Worth of Words
The following 366 words (one extra for leap years) are used in the various vocabulary quizzes that you may have to take! If you can learn all of the words you will be one step ahead for not only your classes, but also for the SAT or ACT.

Etymologic: Hardest Word Game on the Net
Want to play the toughest vocabulary game on the web? Try to guess the meaning of a word or phrase. The answers will surprise you (they really are tough!), but you will at least learn weird and wonderful words.

Vocabulary.com
Type in the web address on their page and this online program will turn every word on that page into a clickable link that will reveal a definition in Merriam-Webster's Dictionary or Thesaurus. Vocabulary will also translate a Web page into another language for you!