Call of the Wild Crossword

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Across
  1. 3. Never ending or changing
  2. 6. Skill or expertise
  3. 7. A desire to achieve something
  4. 10. Absolutely necessary
  5. 13. Send off to a destination
  6. 14. Words inscribed
  7. 15. Lean and haggard
  8. 16. Outbursts of energy
  9. 17. Critical or demanding
  10. 18. Extremely hungry
Down
  1. 1. Exaggerate illness in order to escape from work
  2. 2. Difficult and tiring
  3. 4. A unusual habit
  4. 5. Left in peace
  5. 6. Make someone less hostile
  6. 8. Feelings of anxiety
  7. 9. Important
  8. 10. Causing public shame
  9. 11. Without comfort
  10. 12. In a moment