harmonize vs modify

harmonize and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
harmonize	No	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of harmonize; that is, modify is a word with a broader meaning than harmonize:

harmonize: bring into consonance, harmony, or accord while making music or singing
modify: cause to change; make different; cause a transformation

Other hypernyms of harmonize include alter, change.

harmonize (verb)	modify (verb)
bring into consonance, harmony, or accord while making music or singing	make less severe or harsh or extreme
bring into consonance or accord	add a modifier to a constituent
bring (several things) into consonance or relate harmoniously	cause to change; make different; cause a transformation
sing or play in harmony
write a harmony for
go together