X-ray tube vs X-ray machine

X-ray tube and X-ray machine both are nouns.

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

X-ray tube (noun)	X-ray machine (noun)
a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays	an apparatus that provides a source of X rays