electronic computer vs cathode-ray tube

electronic computer and cathode-ray tube both are nouns.

Word	Noun	Adjective	Verb	Adverb
electronic computer	Yes	No	No	No
cathode-ray tube	Yes	No	No	No

electronic computer (noun)	cathode-ray tube (noun)
a machine for performing calculations automatically	a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen