factorisation vs Australian spelling

factorisation and Australian spelling both are nouns.

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

factorisation (noun)	Australian spelling (noun)
(mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')