Australian spelling vs fluoridise

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

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

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

Australian spelling (verb)	fluoridise (verb)
	subject to fluoridation; treat with fluoride