Wordquest

From BoardGameGeek:

In Wordquest, players are confronted with a tableau of letters. Each tableau has a list of words that can be found in those letters, whether left to right, right to left, top to bottom, bottom to top, or diagonally. This game is basically a multi-player word search. When you locate the word, you mark it with your color tiles. If an opponent finds a word that uses a letter with your tile marking it, your word gets erased from the board. Whoever has the most tiles on the board when all the words are found wins.