1. Seen
    See, seeing, saw, have seen.
  2. Canon vs Cannon
    A ship can be canon but only a cannon can be on a ship.
  3. Casted
    Cast. Cast cast cast. Technically this probably isn't even misuse; can you misuse a word that doesn't exist? CAST.
  4. Breath vs Breathe
    No shit you can't breath; it's not a verb.
  5. Lose vs Loose
    Look, I never claimed I wasn't a walking cliche.
  6. Dad/Mom
    I feel like we've reached a point where I just want use of these words to be reserved for one's actual parents. I'm sorry.