plant fibre vs Australian spelling

plant fibre and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
plant fibre	Yes	No	No	No
Australian spelling	Yes	No	No	No

plant fibre (noun)	Australian spelling (noun)
fiber derived from plants	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')