Catachresis

A figure by which one word is wrongly put for another, or by which a word is wrested from its true signification; as, "To take arms against a sea of troubles". Shak. "Her voice was but the shadow of a sound." Young.

strained or paradoxical use of words either in error (as ‘blatant’ to mean ‘flagrant’) or deliberately (as in a mixed metaphor: ‘blind mouths’)