demonetisation vs British spelling

demonetisation and British spelling both are nouns.

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

demonetisation (noun)	British spelling (noun)
ending something (e.g. gold or silver) as no longer the legal tender of a country	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')