peripheral vs central

peripheral and central both are nouns.

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

peripheral (noun)	central (noun)
electronic equipment external to the circuit board that contains the CPU of a computer	a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication

peripheral (adjective)	central (adjective)
on or near an edge or constituting an outer boundary; the outer area	in or near a center or constituting a center; the inner area
related to the key issue but not of central importance	serving as an essential component