ph and gh as /f/

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Across
  1. 2. a mammal that lives in the sea
  2. 4. winning
  3. 7. a basin farm animals drink from
  4. 8. your sister's son
  5. 9. the knowledge of word sounding
  6. 12. when you don't need anymore
  7. 13. a prize
  8. 14. an image made with a phone or camera
  9. 15. an arrangement of data
  10. 16. a period of time
  11. 17. a sound made when one is happy
  12. 18. a device to call or text someone
Down
  1. 1. a very large mammal
  2. 3. a forceful breath of air pushed outward
  3. 5. not smooth
  4. 6. science
  5. 9. a ghostly specter
  6. 10. not weak
  7. 11. an image made with a camera
  8. 14. a section of writing