desynchronisation vs British spelling

desynchronisation and British spelling both are nouns.

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

desynchronisation (noun)	British spelling (noun)
the relation that exists when things occur at unrelated times	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')