reharmonize vs harmonise

reharmonize and harmonise both are verbs.

Word	Noun	Adjective	Verb	Adverb
reharmonize	No	No	Yes	No
harmonise	No	No	Yes	No

As verbs, harmonise is a hypernym of reharmonize; that is, harmonise is a word with a broader meaning than reharmonize:

Other hypernyms of reharmonize include harmonize.

reharmonize (verb)	harmonise (verb)
provide with a different harmony	bring into consonance, harmony, or accord while making music or singing
	bring into consonance or accord
	bring (several things) into consonance or relate harmoniously
	sing or play in harmony
	write a harmony for
	go together