Australian spelling vs characterisation

Australian spelling and characterisation both are nouns.

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

Australian spelling (noun)	characterisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a graphic or vivid verbal description
	the act of describing distinctive characteristics or essential features