English is a Funny Language
An oxymoron is usually defined as a phrase in which two words of contradictory meaning are brought together. 
A few to ponder on:
  1. Clearly misunderstood
  2. Act naturally
  3. Exact estimate
  4. Found missing
  5. Small crowd
  6. Fully empty
  7. Pretty ugly
  8. Seriously funny
  9. Only choice
  10. Original copies
…and the mother of all
      11  Happily married