polarisation vs Australian spelling

polarisation and Australian spelling both are nouns.

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

polarisation (noun)	Australian spelling (noun)
the phenomenon in which waves of light or other radiation are restricted in direction of vibration	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
the condition of having or giving polarity