immortalise vs Australian spelling

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

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

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

immortalise (verb)	Australian spelling (verb)
make famous forever
be or provide a memorial to a person or an event