<p><strong>Adjective</strong></p><ul><li>marked by agreement in feeling, attitude, or action: a harmonious group.</li><li>forming a pleasingly consistent whole; congruous: harmonious colors.</li><li>pleasant to the ear; tuneful; melodious.</li></ul><p><strong>Synonyms</strong></p><ul><li>sympathetic</li><li>congenial</li><li>amicable</li><li>consistent</li><li>consonant</li><li>congruent</li><li>concordant</li></ul><p><strong>Antonyms</strong></p><ul><li>discordant</li></ul>