What's the difference between catachresis and malapropism?

Catachresis


Definition:

  • (n.) 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.

Example Sentences:

  • (1) Catachresis (M) (a tool is used for an unusual purpose or a machine is required to exceed normal work load).

Malapropism


Definition:

  • (n.) A grotesque misuse of a word; a word so used.

Example Sentences:

  • (1) My mum, Olwen, was a bright and talkative woman who loved a gossip and a story, and was given slightly to malapropisms.
  • (2) Her Mrs Malaprop in Belgrade Theatre's touring production of Sheridan's The Rivals was hailed as "the play's vociferous focal point".
  • (3) In some patients, the combinative ambiguity or malapropism expresses the fear of reprisal through the transformation into a self-inflicted injury.
  • (4) The point is malapropisms and mispronunciations are fairly common.