Australian spelling vs ionise

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

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

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

Australian spelling (verb)	ionise (verb)
	convert into ions
	become converted into ions