Quick definitions from WordNet (harmonize)
▸ verb: go together ("The colors don't harmonize")
▸ verb: bring into consonance, harmony, or accord while making music or singing
▸ verb: bring into consonance or accord ("Harmonize one's goals with one's abilities")
▸ verb: bring into consonance or relate harmoniously ("Harmonize the different interests")
▸ verb: sing or play in harmony
▸ verb: write a harmony for
▸ Also see harmonize
▸ verb: go together ("The colors don't harmonize")
▸ verb: bring into consonance, harmony, or accord while making music or singing
▸ verb: bring into consonance or accord ("Harmonize one's goals with one's abilities")
▸ verb: bring into consonance or relate harmoniously ("Harmonize the different interests")
▸ verb: sing or play in harmony
▸ verb: write a harmony for
▸ Also see harmonize