British spelling vs naturalise

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

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

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

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