Australian spelling vs biological defence

Australian spelling and biological defence both are nouns.

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

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