papillary tumour vs British spelling

papillary tumour and British spelling both are nouns.

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

papillary tumour (noun)	British spelling (noun)
a benign epithelial tumor forming a rounded mass	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')