characterise vs Australian spelling

characterise is not a noun while Australian spelling is a noun.

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

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

characterise (verb)	Australian spelling (verb)
describe or portray the character or the qualities or peculiarities of
be characteristic of