American English orthography vs American English spelling

American English orthography and American English spelling both are nouns.

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

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

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

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

American English orthography (noun)	American English spelling (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')