naturalisation vs naturalise

naturalisation is a noun but naturalise is not a noun.

Word	Noun	Adjective	Verb	Adverb
naturalisation	Yes	No	No	No
naturalise	No	No	Yes	No

naturalisation (noun)	naturalise (noun)
the proceeding whereby a foreigner is granted citizenship
changing the pronunciation of a borrowed word to agree with the borrowers' phonology
the introduction of animals or plants to places where they flourish but are not indigenous
the quality of being brought into conformity with nature

naturalisation (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