Verbs

(v)harmonize, harmonise, consort, accord, concord, fit in, agreego together“The colors don't harmonize”, “Their ideas concorded”
(v)harmonize, harmonisewrite a harmony for
(v)harmonize, harmonisesing or play in harmony
(v)harmonize, harmonisebring (several things) into consonance or relate harmoniously“harmonize the different interests”
(v)harmonize, harmonise, reconcilebring into consonance or accord“harmonize one's goals with one's abilities”
(v)harmonize, harmonise, chordbring into consonance, harmony, or accord while making music or singing