Australian spelling vs circularise

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

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

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

Australian spelling (verb)	circularise (verb)
	cause to become widely known
	distribute circulars to
	canvass by distributing letters