demagnetisation vs British spelling

demagnetisation and British spelling both are nouns.

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

demagnetisation (noun)	British spelling (noun)
the process of removing magnetization	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')