relativisation vs British spelling

relativisation and British spelling both are nouns.

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

relativisation (noun)	British spelling (noun)
the act or result of making relative or regarding as relative rather than absolute.	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')