realise vs realisation

realise is not a noun while realisation is a noun.

Word	Noun	Adjective	Verb	Adverb
realise	No	No	Yes	No
realisation	Yes	No	No	No

realise (noun)	realisation (noun)
	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

realise (verb)	realisation (verb)
perceive (an idea or situation) mentally
be fully aware or cognizant of
make real or concrete; give reality or substance to
expand or complete (a part in a piece of baroque music) by supplying the harmonies indicated in the figured bass
convert into cash; of goods and property
earn on some commercial or business transaction; earn as salary or wages