Australian spelling vs colonisation

Australian spelling and colonisation both are nouns.

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

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