computing machine vs peripheral

computing machine and peripheral both are nouns.

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

computing machine (noun)	peripheral (noun)
a machine for performing calculations automatically	electronic equipment external to the circuit board that contains the CPU of a computer

computing machine (adjective)	peripheral (adjective)
	on or near an edge or constituting an outer boundary; the outer area
	related to the key issue but not of central importance