peripheral vs printer

peripheral and printer both are nouns.

Word	Noun	Adjective	Verb	Adverb
peripheral	Yes	Yes	No	No
printer	Yes	No	No	No

As nouns, printer is a hyponym of peripheral; that is, printer is a word with a more specific, narrower meaning than peripheral:

peripheral: electronic equipment external to the circuit board that contains the CPU of a computer
printer: (computer science) an output device that prints the results of data processing

Other hyponyms of peripheral include data input device, input device, output device.

peripheral (noun)	printer (noun)
electronic equipment external to the circuit board that contains the CPU of a computer	a machine that prints
	(computer science) an output device that prints the results of data processing
	someone whose occupation is printing

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