The word "more mismated" means further or additional incompatibility between two things, ideas or people. The antonyms of "more mismated" would be harmonious, compatible, like-minded, amicable, and sympathetic. Harmonious refers to the state of things being in agreement and working together, while compatible refers to the ability of two things to co-exist without causing problems. Like-minded suggests that two or more people share the same opinions, ideas and values. Amicable means friendly and peaceable, while sympathetic implies understanding and shared emotions. All these words are antonyms of "more mismated," implying that they describe a sense of agreement or unity rather than discord.