decimalise vs Australian spelling

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

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

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

decimalise (verb)	Australian spelling (verb)
change to the decimal system
change from fractions to decimals