American spelling vs storm center

American spelling and storm center both are nouns.

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

American spelling (noun)	storm center (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the central area or place of lowest barometric pressure within a storm
	a center of trouble or disturbance