inner vs central

inner is not a noun while central is a noun.

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

inner (noun)	central (noun)
	a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication

inner (adjective)	central (adjective)
located or occurring within or closer to a center	in or near a center or constituting a center; the inner area
exclusive to a center; especially a center of influence	serving as an essential component
inside or closer to the inside of the body
innermost or essential
located inward
confined to an exclusive group