marked by agreement in feeling, attitude, or action

a harmonious group.

forming a pleasingly consistent whole; congruous

harmonious colors.

pleasant to the ear; tuneful; melodious.

adjective

cacophonous , disagreeable , discordant , dissonant , harsh , inharmonious , opposed , unfriendly , unlike , antagonistic , incompatible

adjective

accordant , adapted , amicable , balanced , compatible , concordant , congenial , congruous , consonant , coordinated , cordial , dulcet , euphonious , harmonic , harmonizing , in accord , in chorus , in concert , in harmony , in step , in tune , in unison , like , matching , mellifluous , melodic , melodious , mix , musical , of one mind , on same wavelength , peaceful , rhythmical , silvery , similar , simpatico , sonorous , suitable , sweet-sounding , symmetrical , sympathetic , symphonic , symphonious , tuneful , conformable , consistent , correspondent , corresponding , affable , agreeable , assonant , attuned , companionable , conciliatory , concinnous , congruent , cooperative , en rapport , euphonic , eurhythmic , friendly , irenic , mellifluent , melodious amicable , pacific , pacificatory , peaceable , proportional , reconciliatory , rhythmic , sociable , spheral , synchronous , syncretic , syncretistic , tranquilizing , unified , uniform , unisonant