roentgenogram vs X ray

roentgenogram and X ray both are nouns.

Word	Noun	Adjective	Verb	Adverb
roentgenogram	Yes	No	No	No
X ray	Yes	No	No	No

As nouns, roentgenogram and X ray are synonyms defined as:

roentgenogram and X ray: a radiogram made by exposing photographic film to X rays; used in medical diagnosis

Other synonyms of roentgenogram include X-ray, X-ray photograph, X-ray picture.

roentgenogram (noun)	X ray (noun)
a radiogram made by exposing photographic film to X rays; used in medical diagnosis	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