No country ends with the letter X.
Halifax
Some cities that start with x are Xi An and Xiamen both in China.
phoenix
A three letter word that ends in the letter x could be the word Hex. A hex is a witches curse or spell.
No, there is no word in the English language that starts and ends with the letter "x."
Ibex?
anthrax
appendix.
phlox
t-rex
Unfix is a 5 letter word. It begins with U and ends with X.