malodour vs Australian spelling

malodour and Australian spelling both are nouns.

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

malodour (noun)	Australian spelling (noun)
a distinctive odor that is offensively unpleasant	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')