Australian spelling vs de-emphasise

Australian spelling is a noun but de-emphasise is not a noun.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
de-emphasise	No	No	Yes	No

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

Australian spelling (verb)	de-emphasise (verb)
	reduce the emphasis