Answer: harmonic

AnswerCrossword Clue
HARMONICKind of musical interval
HARMONICConcordant
HARMONICFifth, e.g.
HARMONICPleasing to the ear
HARMONICConsonant
harmonican overtone (a higher partial tone)
harmonican integrated nature congruous
harmonicor relating to musical harmony or a harmonic
harmonicmusical
harmoniceasing to the ear harmonious