mediaeval vs Australian spelling

mediaeval is not a noun while Australian spelling is a noun.

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

mediaeval (noun)	Australian spelling (noun)
	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

mediaeval (adjective)	Australian spelling (adjective)
relating to or belonging to the Middle Ages
as if belonging to the Middle Ages; old-fashioned and unenlightened
characteristic of the time of chivalry and knighthood in the Middle Ages