Puzzle maker

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Across
  1. 3. four times
  2. 5. shapes fit together
  3. 6. understood
  4. 8. federal approval
  5. 9. sounds like 2
  6. 10. a style of writing
  7. 11. sufficient substitute
  8. 13. oval
  9. 15. a measurement for electricity
Down
  1. 1. chemical
  2. 2. muscular
  3. 4. development
  4. 7. blood
  5. 12. cycle
  6. 14. cells