myelinisation vs British spelling

myelinisation and British spelling both are nouns.

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

myelinisation (noun)	British spelling (noun)
the development of a myelin sheath around a nerve fiber	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')