carburettor vs Australian spelling

carburettor and Australian spelling both are nouns.

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

carburettor (noun)	Australian spelling (noun)
mixes air with gasoline vapor prior to explosion	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')