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