angiogram vs X-ray

angiogram and X-ray both are nouns.

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

As nouns, X-ray is a hypernym of angiogram; that is, X-ray is a word with a broader meaning than angiogram:

angiogram: an X-ray representation of blood vessels made after the injection of a radiopaque substance
X-ray: a radiogram made by exposing photographic film to X rays; used in medical diagnosis

Other hypernyms of angiogram include roentgenogram, X-ray photograph, X-ray picture, X ray.

angiogram (noun)	X-ray (noun)
an X-ray representation of blood vessels made after the injection of a radiopaque substance	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