American spelling vs nerve center

American spelling and nerve center both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
nerve center	Yes	No	No	No

American spelling (noun)	nerve center (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	a cluster of nerve cells governing a specific bodily process
	a center that provides information and control