100s of Common Errors in English Usage

For example Brunt and Butt:

A person who is the target of jokers is the butt of their humor (from an old meaning of the word “butt”: target for shooting at). But the object of this joking has to bear the brunt of the mockery (from an old word meaning a sharp blow or attack). A person is never a brunt. The person being attacked receives the brunt of it.

and Classic and Classical:

“Classical” usually describes things from ancient Greece or Rome, or things from analogous ancient periods like classical Sanskrit poetry. The exception is classical music, which in the narrow sense is late 18th- and 19th-century music by the likes of Mozart, Haydn, and Beethoven, and in the broader sense formal concert music of any period in the West or traditional formal music from other cultures, like classical ragas.

“Classic” has a much looser meaning, describing things that are outstanding examples of their kind, like a classic car or even a classic blunder.

or Nauseated and Nauseous:

Many people say, when sick to their stomachs, that they feel “nauseous” (pronounced “NOSH-uss” or “NOZH-uss”) but traditionalists insist that this word should be used to describe something that makes you want to throw up: something nauseating. They hear you as saying that you make people want to vomit, and it tempers their sympathy for your plight. Better to say you are “nauseated,” or simply that you feel like throwing up.

Lots more fun here.