When two parties cannot come to a mutual understanding, they experience a "non-agreement." To describe the opposite scenario, where both parties are in agreement, the term "agreement" is used. Other antonyms for non-agreement include terms such as harmony, concurrence, accord, and consensus. These words describe a state of agreement that is reached through mutual understanding, cooperation, and compromise. They are often used to describe successful negotiations, partnerships, and collaborative efforts. A contrasting term for non-agreement could also be "discord," which describes a state of conflict, disagreement, and disharmony. When there is discord between two parties, there is no agreement or harmony, making it difficult to come to a resolution.