oct/pent words

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Across
  1. 1. A contest featuring five events
  2. 3. a sea creature with 8 tentacles.
  3. 5. Five years or group of five
  4. 9. star polygon
  5. 11. a 2D shape with 8 angles and sides
  6. 12. starts with the letter f and ends with the letter k
  7. 13. of the year.
  8. 14. five fingers
  9. 15. has the Jen in it
  10. 16. (originally) the 8th
Down
  1. 2. a 3D object with 8 flat faces.
  2. 4. A regular five
  3. 6. starts with the letter e and ends with the letter c
  4. 7. starting with a c
  5. 8. has a b in it
  6. 9. five carbon atoms in a molecule
  7. 10. starts with the letter e and ends with the letter a
  8. 11. a series of 8 notes (in music).