Noun modification using 'with'

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Across
  1. 2. a pet with whiskers
  2. 7. a biome with very little rain
  3. 8. a sea creature with stinging tentacles
  4. 11. a sea creature with eight legs
  5. 13. a desert plant with needles
  6. 16. a building with many works of art in it
  7. 17. an animal with feathers
  8. 18. a toy with many pieces that fit together
  9. 20. an animal with eight legs
  10. 22. an animal with long ears
  11. 23. a building with many homes in it
  12. 26. a biome with lots of precipitation and many trees
  13. 27. a large cat with spots
  14. 30. a child without parents
  15. 31. a frozen biome with no trees
Down
  1. 1. a giant with one eye
  2. 3. a reptile with a shell on its back
  3. 4. an animal with gills and fins
  4. 5. a chair with no back
  5. 6. a mythical woman with snakes in her hair
  6. 7. a snack with a hole in it
  7. 9. a reptile without legs
  8. 10. a toy with a long string
  9. 12. a horse with a horn
  10. 14. a musical instrument with six strings
  11. 15. an animal with a long trunk
  12. 19. a building with many books
  13. 20. a sea creature with five legs
  14. 21. a long time without rain
  15. 24. a piece of paper with locations on it
  16. 25. a building with many stores inside it
  17. 28. a musical instrument with black and white keys
  18. 29. an animal with a long neck