Word Within Word

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Across
  1. 4. Toward the front
  2. 5. Equipoise
  3. 11. Shoot planes down
  4. 12. After a letter
  5. 13. Within Cells
  6. 14. Not obey
  7. 15. Between nations
  8. 16. Go around
  9. 18. Symmetrical
  10. 19. Destroy
  11. 20. Fail to fire at a certain time
  12. 21. Together
  13. 22. Not fiction
Down
  1. 1. Before a test
  2. 2. Super excellent
  3. 3. Bad
  4. 5. ALIENS!!!
  5. 6. Introduce
  6. 7. Below water
  7. 8. Ride around on two wheels
  8. 9. Not fit
  9. 10. Man made
  10. 16. Self assurance
  11. 17. Ride on three wheels
  12. 18. Half of a cricle