immunise vs British spelling

immunise is not a noun while British spelling is a noun.

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

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

immunise (verb)	British spelling (verb)
perform vaccinations or produce immunity in by inoculation
grant immunity from prosecution