British spelling vs optical fibre

British spelling and optical fibre both are nouns.

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

British spelling (noun)	optical fibre (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images