The term "dis-harmonic" generally refers to something that is discordant or lacking in harmony. Some antonyms for this term include "harmonic", "melodious", "consonant", "unison", "harmonious", "tuneful", "harmonizing", and "euphonious". These words all suggest a sense of musical coherence and unity, and can be used to describe pleasing and harmonious sounds. Additionally, some antonyms for "dis-harmonic" can be used to describe more general aspects of life, such as "harmonious" referring to a peaceful and unified situation, or "consonant" suggesting consistency and compatibility.