mis ‧ match /ˈmɪsmætʃ/ BrE AmE noun [countable]
a combination of things or people that do not work well together or are not suitable for each other
mismatch between
the mismatch between the demand for health care and the supply
—mismatched /ˌmɪsˈmætʃt◂/ adjective :
a mismatched couple