One word for a phrase

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Across
  1. 3. someone who does not eat meat
  2. 6. a person who works for free
  3. 7. one who owes money to another
  4. 8. a word with the same meaning as another
  5. 9. device used for cutting objects like paper
  6. 12. the study of animals
  7. 14. in a timely manner
  8. 15. eskimo home made of ice bricks
  9. 16. horse-like animal with black and white stripes
Down
  1. 1. the scientific study of weather conditions
  2. 2. name used for a baby cat
  3. 4. study of sciences relating to the bodily structure of a human
  4. 5. large vehicle used to transport large number of people
  5. 9. in the near future
  6. 10. that which is against the law
  7. 11. an instrument used for breathing underwater whilst swimming
  8. 13. a pleasant song sung to children to send them to sleep