Jumbulaya

From BoardGameGeek:

Each player works with five letter tiles on his/her tray and all the letters on the board, rearranging, adding, and trading them, building and claiming longer and longer words each turn. Simultaneously, as players build words horizontally, they also look for a JUMBULAYA. A JUMBULAYA is a seven-, eight-, or nine-tile word that can be spelled vertically on the board. Players will be able to strategize and plan multiple moves ahead to create longer and longer words. A player earns points for all lines he/she claims, bonus points for using "letter-combo" tiles, and even more points for being the first to find a JUMBULAYA. The player who earns the most points, wins! 2008 Mensa Select 2008 GAMES Magazine Word Game of the Year