Write the missing American English or British English word

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Across
  1. 4. BE: mobile (phone)
  2. 6. AE: fall
  3. 7. BE: neighbour
  4. 9. BE: trousers
  5. 11. AE: color
  6. 12. BE: rubbish
Down
  1. 1. AE: center
  2. 2. AE: vacation
  3. 3. BE: (a) flat
  4. 5. AE: meter
  5. 8. AE: cookie
  6. 10. BE: chips