Australian spelling vs spoilt

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

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

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

Australian spelling (adjective)	spoilt (adjective)
	affected by blight; anything that mars or prevents growth or prosperity
	having the character or disposition harmed by pampering or oversolicitous attention
	(of foodstuffs) not in an edible or usable condition