Silent letters

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Across
  1. 2. a personal follower of Christ during his life
  2. 5. known as fall in America
  3. 7. to construct something
  4. 9. proof of purchase
  5. 10. feeling of uncertainty
Down
  1. 1. serious without any humour
  2. 3. a piece of land surrounded by water
  3. 4. a young sheep
  4. 6. a flowering plant with sharp leaves
  5. 8. to move or climb upwards