Australian spelling vs dioptre

Australian spelling and dioptre both are nouns.

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

Australian spelling (noun)	dioptre (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists