I keep hearing people mistakenly use the word misnomer when they mean myth. Heard it again on NPR yesterday, this time from a scientist. A misnomer is a misleading or inaccurate name or term for something, as in the case of golf clubs known as woods. Woods are no longer made of wood, but they're still called woods.
And in the past few days, I've twice come across the phrase "anti-Trump sycophant," referring to someone who hates Trump. I don't think sycophant means what they think it means.
One more: Mortified does not mean outraged. It means embarrassed, like embarrassed to death. Or it can mean subdue the flesh, which is the way it's sometimes used by religious people when referring to self-discipline and self-denial of bodily needs, pleasures and desires.