babygram vs X-ray photograph

babygram and X-ray photograph both are nouns.

Word	Noun	Adjective	Verb	Adverb
babygram	Yes	No	No	No
X-ray photograph	Yes	No	No	No

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

babygram: an X-ray of the entire body of an infant.
X-ray photograph: a radiogram made by exposing photographic film to X rays; used in medical diagnosis

Other hypernyms of babygram include roentgenogram, X-ray, X-ray picture, X ray.

babygram (noun)	X-ray photograph (noun)
an X-ray of the entire body of an infant.	a radiogram made by exposing photographic film to X rays; used in medical diagnosis