sub super

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Across
  1. 3. to turn in
  2. 5. taking away
  3. 7. really really really fast
  4. 10. the soil layer under the top soil
  5. 13. the part of a structure that is above
  6. 14. a person in charge of others
  7. 15. a place completely under water
  8. 16. to go under water
Down
  1. 1. a person in charge of a school district
  2. 2. underground train system
  3. 4. above expectations
  4. 6. vehicle that travels under the ocean
  5. 8. HEB
  6. 9. something that replaces something else
  7. 11. a computer that is more advanced
  8. 12. below average
  9. 15. a person who has an amazing power above human capabilities