realisation vs British spelling

realisation and British spelling both are nouns.

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

realisation (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')
a sale in order to obtain money (as a sale of stock or a sale of the estate of a bankrupt person) or the money so obtained
something that is made real or concrete
the completion or enrichment of a piece of music left sparsely notated by a composer
coming to understand something clearly and distinctly
a musical composition that has been completed or enriched by someone other than the composer