monitor vs computing machine

monitor and computing machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
monitor	Yes	No	Yes	No
computing machine	Yes	No	No	No

monitor (noun)	computing machine (noun)
any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles	a machine for performing calculations automatically
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)	computing machine (verb)
keep tabs on; keep an eye on; keep under surveillance
check, track, or observe by means of a receiver