The Call of the Wild

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Across
  1. 2. - An uncultivated, uninhabited, and inhospitable region.
  2. 5. - Relating to an early stage in evolutionary development; primeval.
  3. 6. - Unpleasantly rough or jarring to the senses.
  4. 8. - A vehicle mounted on runners for transporting goods or people over snow or ice, pulled by dogs or horses.
  5. 11. - The action or process of adapting or being adapted.
  6. 13. - Relating to an early stage of civilization or development; basic or simple.
  7. 15. - The projecting part of the face, including the nose and mouth, of an animal such as a dog or horse.
  8. 16. - (Of an animal or force of nature) fierce, violent, and uncontrolled.
  9. 17. - Living the life of a nomad; wandering.
  10. 18. - Savagely violent.
Down
  1. 1. - In a wild state, especially after escape from captivity or domestication.
  2. 3. - Tamed and kept as a pet or on a farm.
  3. 4. - Relating to an early stage of evolutionary development; primeval.
  4. 7. - An animal, especially a large or dangerous four-footed one.
  5. 8. - The state or fact of continuing to live or exist, typically in spite of an accident, ordeal, or difficult circumstances.
  6. 9. - (Of an animal or force of nature) fierce, violent, and uncontrolled.
  7. 10. - (Of an animal, typically a bird or fish) move from one region or habitat to another, especially regularly according to the seasons.
  8. 12. - Receive (money, property, or a title) as an heir at the death of the previous holder.
  9. 13. - The skin of an animal with the fur, wool, or hair still on it.
  10. 14. - An innate, typically fixed pattern of behavior in animals in response to certain stimuli.