unitisation vs Australian spelling

unitisation and Australian spelling both are nouns.

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

unitisation (noun)	Australian spelling (noun)
conversion of an investment trust into a unit investment trust	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
the joint development of a petroleum resource that straddles territory controlled by different companies
the act of packaging cargo into unit loads
(psychology) the configuration of smaller units of information into large coordinated units