tranquillise vs Australian spelling

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

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

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

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