Save The Words has a fun challenge and a fun UI. The site gives users the opportunity to 'adopt' a word and find a way to work it into our regular conversations.
For example, during the Minnesota Wild game on Friday, instead of noting that a fight broke out I could have commented that a display of the players' pugnastics was occurring quite early in game.
What? You aren't familiar with pugnastics? Surely you gest. Certainly you know that pugnastics is a display of one's pugilistic ability and it has nothing to do with gymnastics for any breed of dog.