/ ˈmɪsmætʃ; NAmE / noun
mismatch (between A and B) a combination of things or people that do not go together well or are not suitable for each other :
a mismatch between people's real needs and the available facilities
► mis·match / ˌmɪsˈmætʃ/ verb [ vn ] [ often passive ]:
They made a mismatched couple.