colonisation vs British spelling

colonisation and British spelling both are nouns.

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

colonisation (noun)	British spelling (noun)
the act of colonizing; the establishment of colonies	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')