Australian spelling vs orthopaedic

Australian spelling is a noun but orthopaedic is not a noun.

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

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

Australian spelling (adjective)	orthopaedic (adjective)
	of or relating to orthopedics