well klax is one
depends what kind of game you are thinking of though.
theres also trax which is like a console game.
Twix
manx
W, X, y and Z are the last four letters of the alphabet.
Xeme
ibex
A four letter word beginning with C and ending with X is crux.
The answer to the riddle is "Mailbox." It starts with the letter 'M,' ends with 'X,' and can contain an endless number of letters (as in mail) inside it.
Words ending in -ch, -sh, -s, -x tend to form plurals with -es rather than just -s.
Try flux or flax; latter is healthier.
1. you can just look up words ending in X and then go to Q 2. How many letters are in it
Faux Hoax That's all I know
(26) x (26) x (10,000) = 6,760,000