advertising vs Australian spelling

advertising and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
advertising	Yes	No	No	No
Australian spelling	Yes	No	No	No

advertising (noun)	Australian spelling (noun)
the business of drawing public attention to goods and services	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
a public promotion of some product or service