signalisation vs Australian spelling

signalisation and Australian spelling both are nouns.

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

signalisation (noun)	Australian spelling (noun)
a conspicuous indication	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')