monitor vs cathode-ray oscilloscope

monitor and cathode-ray oscilloscope both are nouns.

Word	Noun	Adjective	Verb	Adverb
monitor	Yes	No	Yes	No
cathode-ray oscilloscope	Yes	No	No	No

monitor (noun)	cathode-ray oscilloscope (noun)
any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles	electronic equipment that provides visual images of varying electrical quantities
a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble
electronic equipment that is used to check the quality or content of electronic transmissions
display produced by a device that takes signals and displays them on a television screen or a computer monitor
someone who gives a warning so that a mistake can be avoided
someone who supervises (an examination)

monitor (verb)	cathode-ray oscilloscope (verb)
keep tabs on; keep an eye on; keep under surveillance
check, track, or observe by means of a receiver