catachresis \kat-uh-KREE-sis\, noun:
Misuse or strained use of words, as in a mixed metaphor, occurring either in error or for rhetorical effect.
I actually am completely at a loss as to how to use this in a sentence. I could possibly think of using it's definition, but I don't know how to use the word. Lately the words have been a bit difficult. I'll do better when it's not so late.