dichotomisation vs Australian spelling

dichotomisation and Australian spelling both are nouns.

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

dichotomisation (noun)	Australian spelling (noun)
the act of dividing into two sharply different categories	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')