desalinisation vs British spelling

desalinisation and British spelling both are nouns.

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

desalinisation (noun)	British spelling (noun)
the removal of salt (especially from sea water)	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')