Australian spelling vs overcapitalise

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

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

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

Australian spelling (verb)	overcapitalise (verb)
	capitalize beyond what the business or the profit-making prospects warrant
	overestimate the market value of
	estimate the capital value of (a company) at an unreasonably or unlawfully high level