Word study puzzle maker

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Across
  1. 3. to be lower than something else.
  2. 5. an instrument used by a doctor.
  3. 7. a scientist who studies past remains.
  4. 9. one of four equal parts.
  5. 11. a sovereign head of state.
  6. 14. a strong bag worn on one's back.
  7. 15. a bus that travels back and forth.
  8. 16. a territory ruled by a king.
  9. 17. a deep sadness.
  10. 19. a question or inquiry.
  11. 20. a structure of wax built by bees.
Down
  1. 1. a perfectly vertical like a wall.
  2. 2. a small crease in a smooth surface.
  3. 4. extreme distress or suffering.
  4. 6. watching over someone.
  5. 8. relating to color.
  6. 10. a substance made of elements.
  7. 12. a dwarf-like creature.
  8. 13. a building for performances.
  9. 18. strongly desiring food.