All interests over the rainbow

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Across
  1. 5. an interest in amphibians
  2. 6. people who have an interest in caves
  3. 7. a particular interest in dreams
  4. 8. someone who studies molluscs
  5. 10. another word for a sleepwalker
  6. 11. a cat lover
  7. 13. crossword masters
  8. 14. a person who sees the worst in everything
  9. 15. people who collect money
Down
  1. 1. collector of stamps
  2. 2. someone who loves makeup
  3. 3. a___predicts the weather
  4. 4. you get hypnotised by a___
  5. 9. a child doctor
  6. 12. a hopeful or content person