13-Letter Words End with 'x'

There are 3 13-letter words that end with 'x'.

archaeopteryx	cephalothorax
ultraorthodox

Note: These 3 13-letter words that end with 'x' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words end with ex, ox, ix, ax, ux, nx, yx, lx.

2-letter words end with 'x' (3)
3-letter words end with 'x' (32)
4-letter words end with 'x' (24)
5-letter words end with 'x' (50)
6-letter words end with 'x' (71)
7-letter words end with 'x' (85)
8-letter words end with 'x' (68)
9-letter words end with 'x' (26)
10-letter words end with 'x' (18)
11-letter words end with 'x' (6)
12-letter words end with 'x' (4)
13-letter words end with 'x' (3)
14-letter words end with 'x' (1)