Australian spelling vs systematise

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

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

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

Australian spelling (verb)	systematise (verb)
	arrange according to a system or reduce to a system