due to the lack of available tiles, which of the following words cannot be played in scrabble

The word that cannot be played in Scrabble due to the lack of available tiles is "pizzazz." This is because a standard Scrabble set contains only two "Z" tiles, but "pizzazz" requires three or four "Z" tiles to be spelled, making it impossible to play with a single set of tiles. Other words that require more tiles than available would similarly be unplayable. This limitation is tied to the fixed distribution of tiles in the game.