reharmonization vs reharmonisation

reharmonization and reharmonisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
reharmonization	Yes	No	No	No
reharmonisation	Yes	No	No	No

As nouns, reharmonization and reharmonisation are synonyms defined as:

reharmonization and reharmonisation: a piece of music whose original harmony has been revised

reharmonization (noun)	reharmonisation (noun)
a piece of music whose original harmony has been revised	a piece of music whose original harmony has been revised