American spelling vs primary color

American spelling and primary color both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
primary color	Yes	No	No	No

American spelling (noun)	primary color (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	any of three colors from which all others can be obtained by mixing