Australian spelling vs tranquillise

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

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

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

Australian spelling (verb)	tranquillise (verb)
	cause to be calm or quiet as by administering a sedative to
	make calm or still