Synonyms for X Ray (same or very similar meaning)
WordNet sense 1 (electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target):
x-ray, X-radiation, roentgen rayWordNet sense 2 (a radiogram made by exposing photographic film to X rays; used in medical diagnosis):
roentgenogram, X-ray photograph, X-ray pictureFrom the ODE community, based on WordNetadd/edit