decimalisation vs British spelling

decimalisation and British spelling both are nouns.

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

decimalisation (noun)	British spelling (noun)
the act of changing to a decimal system	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')