tomograph vs X-ray machine

tomograph and X-ray machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
tomograph	Yes	No	No	No
X-ray machine	Yes	No	No	No

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

tomograph: X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements
X-ray machine: an apparatus that provides a source of X rays

tomograph (noun)	X-ray machine (noun)
X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements	an apparatus that provides a source of X rays