British spelling vs realisation

British spelling and realisation both are nouns.

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

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