unappetising vs Australian spelling

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

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

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

unappetising (adjective)	Australian spelling (adjective)
not appetizing in appearance, aroma, or taste