nerve fibre vs British spelling

nerve fibre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
nerve fibre	Yes	No	No	No
British spelling	Yes	No	No	No

nerve fibre (noun)	British spelling (noun)
a threadlike extension of a nerve cell	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')