British spelling vs conventionalisation

British spelling and conventionalisation both are nouns.

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

British spelling (noun)	conventionalisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the act of conventionalizing; conforming to a conventional style