X-radiation vs X ray

X-radiation and X ray both are nouns.

Word	Noun	Adjective	Verb	Adverb
X-radiation	Yes	No	No	No
X ray	Yes	No	No	No

As nouns, X-radiation and X ray are synonyms defined as:

X-radiation and X ray: electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target

Other synonyms of X-radiation include roentgen ray, X-ray.

X-radiation (noun)	X ray (noun)
obtaining images by the use of X rays	a radiogram made by exposing photographic film to X rays; used in medical diagnosis
electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target	electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target