revitalisation vs Australian spelling

revitalisation and Australian spelling both are nouns.

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

revitalisation (noun)	Australian spelling (noun)
bringing again into activity and prominence	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')