British spelling vs reharmonisation

British spelling and reharmonisation both are nouns.

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

British spelling (noun)	reharmonisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	a piece of music whose original harmony has been revised