misdemeanour vs Australian spelling

misdemeanour and Australian spelling both are nouns.

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

misdemeanour (noun)	Australian spelling (noun)
a crime less serious than a felony	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')