There are 8 12-letter words that start with 'x'.
| xanthophylls | xerographies | xerophytisms |
| xiphisternum | xylographers | xylographies |
| xylographing | xylophonists | |
Note: These 8 12-letter words that start with 'x' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with xe, xy, xa, xi, xu.
2-letter words start with 'x' (2)