nonmalignant tumour vs Australian spelling

nonmalignant tumour and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonmalignant tumour	Yes	No	No	No
Australian spelling	Yes	No	No	No

nonmalignant tumour (noun)	Australian spelling (noun)
a tumor that is not cancerous	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')