sub + super, sur

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Across
  1. 3. Not fully aware; occurring below your level of thinking and awareness.
  2. 5. An extra tax beyond the normal tax.
  3. 7. Splendid; excellent; beyond the expected
  4. 8. Above average in quality; excellent
  5. 12. A passage way under the ground; and electric underground railway
  6. 14. A watercraft that stays underwater.
  7. 15. A person that is under someone in rank or importance.
  8. 16. To bring it under control.
  9. 17. To water something from under the ground.
  10. 18. The person with the highest power, power above everyone else
Down
  1. 1. A person that stands over or above someone in rank; a manager in charge of someone else
  2. 2. Under the skin.
  3. 4. Amount of money (charge) over or above something being paid.
  4. 6. To lay or place something over something else
  5. 7. Something that is beyond what is expected.
  6. 8. Below the freezing point.
  7. 9. Beyond what is real or believable; Bizarre
  8. 10. To bring under someone else’s control.
  9. 11. A quantity or amount over and above what is actually needed; extra
  10. 13. To be put under water.