agree vs harmonize

agree and harmonize both are verbs.

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

As verbs, harmonize is a hyponym of agree; that is, harmonize is a word with a more specific, narrower meaning than agree:

agree: be compatible, similar or consistent; coincide in their characteristics
harmonize: go together

As verbs, agree and harmonize are synonyms defined as:

Other synonyms of agree include accord, concord, consort, fit in, harmonise.

agree (verb)	harmonize (verb)
be in accord; be in agreement	bring into consonance, harmony, or accord while making music or singing
consent or assent to a condition, or agree to do something	bring into consonance or accord
achieve harmony of opinion, feeling, or purpose	bring (several things) into consonance or relate harmoniously
be agreeable or suitable	sing or play in harmony
be compatible, similar or consistent; coincide in their characteristics	write a harmony for
go together	go together
show grammatical agreement