vascularisation vs British spelling

vascularisation and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
vascularisation	Yes	No	No	No
British spelling	Yes	No	No	No

vascularisation (noun)	British spelling (noun)
the organic process whereby body tissue becomes vascular and develops capillaries	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')