British spelling vs systematisation

British spelling and systematisation both are nouns.

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

British spelling (noun)	systematisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	systematic organization; the act of organizing something according to a system or a rationale