Australian spelling vs fluoridisation

Australian spelling and fluoridisation both are nouns.

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

Australian spelling (noun)	fluoridisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the addition of a fluoride to the water supply (to prevent dental decay)