Complicated Words

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Across
  1. 4. The scientific study of animals
  2. 9. Grandeur
  3. 12. A dark brown/black colour
  4. 13. Extortionate
  5. 14. Inclined to take offence easily
  6. 15. To satisfy
  7. 16. Excessively complicated
  8. 18. A close-knit group
  9. 19. A period of time in history or a person's life
  10. 20. A thread of string or wool
Down
  1. 1. A sweet and fizzy drink
  2. 2. Leave the main subject temporarily in speech or writing
  3. 3. Scientific tests related to the detection of crime
  4. 5. To surrender
  5. 6. Tending to talk a great deal; talkative
  6. 7. Food made with milk fermented by bacteria
  7. 8. A narrow valley between hills or mountains
  8. 10. To walk past
  9. 11. Of the heavens or the stars
  10. 17. To leave hurriedly and secretly