actualisation vs British spelling

actualisation and British spelling both are nouns.

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

actualisation (noun)	British spelling (noun)
making real or giving the appearance of reality	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')