British spelling vs myelinisation

British spelling and myelinisation both are nouns.

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

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