British spelling vs Ewing's tumour

British spelling and Ewing's tumour both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
Ewing's tumour	Yes	No	No	No

British spelling (noun)	Ewing's tumour (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	malignant tumor in bone marrow (usually in the pelvis or in long bones)