British spelling vs demagnetise

British spelling is a noun but demagnetise is not a noun.

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

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

British spelling (verb)	demagnetise (verb)
	make nonmagnetic; take away the magnetic properties (of)
	erase (a magnetic storage device)