Australian spelling vs specialisation

Australian spelling and specialisation both are nouns.

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

Australian spelling (noun)	specialisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the special line of work you have adopted as your career
	the act of specializing; making something suitable for a special purpose
	(biology) the structural adaptation of some body part for a particular function