American spelling vs full plate armor

American spelling and full plate armor both are nouns.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
full plate armor	Yes	No	No	No

American spelling (noun)	full plate armor (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	a historical type of personal armor made from iron or steel plates entirely encasing the wearer.