Suffixes - -sion, tion, cian

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Across
  1. 4. When something explodes
  2. 8. Making equal groups in maths
  3. 9. To be able to see
Down
  1. 1. Having a race or match against someone else
  2. 2. The guess or estimate something
  3. 3. A strong feeling
  4. 5. An entertainment device for watching things on
  5. 6. A person who tests eyes and prescribes glasses
  6. 7. A person who writes and plays music