mismatch
nounUK /ˌmɪsˈmætʃ/
US /ˌmɪsˈmætʃ/
Two things that do not go together well.
There was a mismatch between the two socks, so they did not make a pair.
RELATED WORDS
OTHER MEANINGS
2. A game or contest where the two sides are not equally strong.
The final was a mismatch, and the stronger team won easily.
3. To put two things together that do not fit or belong together.
She mismatched the colors and the outfit looked strange.
4. A failure of two parts to connect or work together properly.
The mismatch between the plug and the socket meant it would not fit.