Reena "y" making the sound 'i' as in pyramid

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Across
  1. 2. An element that is found in rocks in the sea.
  2. 6. I was doing maths with 3D shapes and I picked
  3. 8. Something that sets something off.
  4. 11. from cultures all over the world.
  5. 12. The same on opposite sides.
  6. 13. Something that represents something.
  7. 14. Words that are spelt the same but different
  8. 16. A word that means the same or is similar to
  9. 17. word.
  10. 18. Combining the special characters of a group.
  11. 19. Hidden or a secret.
Down
  1. 1. Keeps you alive.
  2. 3. I saw a big __________.
  3. 4. I wrote a _________ for a song.
  4. 5. acknowledging someone else's suffering.
  5. 7. A clear fluid that flows through its own
  6. 9. I was in a country called __________.
  7. 10. the __________.
  8. 11. The rich collection of traditional tales called
  9. 15. I was on a ____________ beam.