colonisation vs Australian spelling

colonisation and Australian spelling both are nouns.

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

colonisation (noun)	Australian spelling (noun)
the act of colonizing; the establishment of colonies	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')