Australian spelling vs externalise

Australian spelling is a noun but externalise is not a noun.

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

Australian spelling (noun)	externalise (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

Australian spelling (verb)	externalise (verb)
	make external or objective, or give reality to
	regard as objective