decarbonise vs Australian spelling

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

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

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

decarbonise (verb)	Australian spelling (verb)
remove carbon from (an engine)