regularisation vs British spelling

regularisation and British spelling both are nouns.

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

regularisation (noun)	British spelling (noun)
the act of bringing to uniformity; making regular	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')
the condition of having been made regular (or more regular)