Australian spelling vs appetising

Australian spelling is a noun but appetising is not a noun.

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

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

Australian spelling (adjective)	appetising (adjective)
	appealing to or stimulating the appetite especially in appearance or aroma