Australian spelling vs software optimisation

Australian spelling and software optimisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
software optimisation	Yes	No	No	No

Australian spelling (noun)	software optimisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the process of modifying a software system to make some aspect of it work more efficiently or use fewer resources.