Australian spelling vs biodefence

Australian spelling and biodefence both are nouns.

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

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