British spelling vs fluoridisation

British spelling and fluoridisation both are nouns.

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

British spelling (noun)	fluoridisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the addition of a fluoride to the water supply (to prevent dental decay)