Australian spelling vs chemical defence

Australian spelling and chemical defence both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
chemical defence	Yes	No	No	No

Australian spelling (noun)	chemical defence (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	procedures involved in taking defensive measures against attacks using chemical agents