What are 3 letter words beginning with X?

Answer:
  1. X-ray
  2. Xenon
  3. Xerox
Since the question asked for "three-letter" words beginning with "X", how about "xis"?
First answer by Bozidar. Last edit by Chuckinmaine. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].