SUDOKU is a playable word

sudoku Scrabble® Dictionary

noun
pl. sudokus
a puzzle involving the numbers 1 through 9

25 Playable Words can be made from "SUDOKU"

   2-Letter Words (6 found)

   3-Letter Words (9 found)

   4-Letter Words (7 found)

   5-Letter Words (2 found)

   6-Letter Words (1 found)