circularise vs Australian spelling

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

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

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

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