Mis-matched means two things that are not the same or do not go well together. The antonyms for mis-matched could be matched, harmonious, compatible, fitting, or suitable. These words signify the opposite of mis-matched, indicating when two things complement each other perfectly. For example, when we use the word matched, it means that two things are just right for each other, like a pair of matching shoes. Harmonious and compatible both imply a sense of agreement or compatibility. Fitting or suitable refer to two things that are a perfect fit, like a square peg in a square hole. Therefore, using antonyms for mis-matched, we can confidently say that two things are just right together, and they complement each other perfectly.