Australian spelling vs rationalise

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

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

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

Australian spelling (verb)	rationalise (verb)
	weed out unwanted or unnecessary things
	remove irrational quantities from
	think rationally; employ logic or reason
	defend, explain, clear away, or make excuses for by reasoning
	structure and run according to rational or scientific principles in order to achieve desired results