sanitise vs Australian spelling

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

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

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

sanitise (verb)	Australian spelling (verb)
make less offensive or more acceptable by removing objectionable features
make sanitary by cleaning or sterilizing