Extension words

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Across
  1. 1. Something you're allowed to do.
  2. 3. To circulate.
  3. 4. Unstoppable, invincible.
  4. 6. Something before the recorded history.
  5. 10. The process of dividing regions.
  6. 11. Something that belongs to the nation.
  7. 12. The act of being graduated.
  8. 13. A person who checks your teeth.
  9. 14. Something that belongs the old age.
Down
  1. 1. Powered by the sun.
  2. 2. To change the number to the decimal system.
  3. 5. Plants and flowers.
  4. 7. The right payment of anything.
  5. 8. Something you're not allowed to do.
  6. 9. At some point.