neighboring vs American spelling

neighboring is not a noun while American spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
neighboring	No	Yes	No	No
American spelling	Yes	No	No	No

neighboring (noun)	American spelling (noun)
	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

neighboring (adjective)	American spelling (adjective)
having a common boundary or edge; abutting; touching