papillary tumour vs Australian spelling

papillary tumour and Australian spelling both are nouns.

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

papillary tumour (noun)	Australian spelling (noun)
a benign epithelial tumor forming a rounded mass	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')