Australian spelling vs immunise

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

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

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

Australian spelling (verb)	immunise (verb)
	perform vaccinations or produce immunity in by inoculation
	grant immunity from prosecution