Australian English orthography vs Australian English spelling

Australian English orthography and Australian English spelling both are nouns.

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

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

Australian English orthography and Australian English spelling: English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

Other synonyms of Australian English orthography include Australian spelling.

Australian English orthography (noun)	Australian English spelling (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')