American English spelling vs American English orthography

American English spelling and American English orthography both are nouns.

Word	Noun	Adjective	Verb	Adverb
American English spelling	Yes	No	No	No
American English orthography	Yes	No	No	No

As nouns, American English spelling and American English orthography are synonyms defined as:

American English spelling and American English orthography: English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

Other synonyms of American English spelling include American spelling, US English orthography, US English spelling, US spelling.

American English spelling (noun)	American English orthography (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')