CRO vs monitor

CRO and monitor both are nouns.

Word	Noun	Adjective	Verb	Adverb
CRO	Yes	No	No	No
monitor	Yes	No	Yes	No

CRO (noun)	monitor (noun)
electronic equipment that provides visual images of varying electrical quantities	any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
	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)

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