Scrabble of points for each lettered tile is based on the letter's frequency in standard English; commonly used letters such as vowels are worth one point, while less common letters score higher, with Q and Z each worth 10 points. The game also has two blank tiles that are unmarked and carry no point value. The blank tiles can be used as substitutes for any letter; once laid on the board, however, the choice is fixed. Other language sets use different letter set distributions with different point values. Tiles are usually made of wood or plastic and are square and thick,
Scrabble variants are formed. This variation is also used on "Scrabble Showdown". This game has the same size board and nearly the same scoring system as Scrabble. The major differences are the inclusion of twelve wild tiles marked with an asterisk that may represent one letter or any series of letters and special board squares that convert a regular letter tile into a wild tile (the tile in question is placed upside down on such a square). The nature of these changes shifts the emphasis of the game from playing short words to playing words of any length. For example, QUA*IST, could