Australian spelling vs isomerisation

Australian spelling and isomerisation both are nouns.

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

Australian spelling (noun)	isomerisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the conversion of a compound into an isomer of itself