naturalise vs British spelling

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

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

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

naturalise (verb)	British spelling (verb)
make into a citizen
make more natural or lifelike
adopt to another place
adapt (a wild plant or unclaimed land) to the environment