There are 14 11-letter words that start with 'x'.
| xanthophyll | xenobiotics | xenophobias |
| xerographic | xerophilies | xerophilous |
| xerophytism | xerothermic | xiphisterna |
| xylographed | xylographer | xylographic |
| xylophagous | xylophonist | |
Note: These 14 11-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)