information processing system vs monitor

information processing system and monitor both are nouns.

Word	Noun	Adjective	Verb	Adverb
information processing system	Yes	No	No	No
monitor	Yes	No	Yes	No

information processing system (noun)	monitor (noun)
a machine for performing calculations automatically	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)

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