kerb vs Australian spelling

kerb and Australian spelling both are nouns.

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

kerb (noun)	Australian spelling (noun)
an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')