American spelling vs Aegean civilization

American spelling and Aegean civilization both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
Aegean civilization	Yes	No	No	No

American spelling (noun)	Aegean civilization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the prehistoric civilization on the islands in the Aegean sea and the surrounding countries