British spelling vs colonise

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

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

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

British spelling (verb)	colonise (verb)
	settle as colonists or establish a colony (in)
	settle as a colony; of countries in the developing world