Let people play word off of another player's word like scrabble? You'd need to keep words out until the beginning of each player's turn, but it could be a fun mechanic.
Hi David, I think that is a really cool idea. Right now each letter tile has a special power similar to each card in Dominion or Ascension and players can play multiple words each turn. If I let people play off each word that might be a bit too much, but I'll try to think of some ways to give limited access to the previous words.