'ous'

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Across
  1. 6. large cave with a lot of caverns
  2. 8. spending a lot of time studying
  3. 10. More then enough
  4. 14. self-importance
  5. 16. difficult to do
  6. 17. of great importance
  7. 19. extremely impressive
  8. 20. eats everything
Down
  1. 1. likes to eat plants
  2. 2. Likes to eat meat
  3. 3. doubting a lot
  4. 4. a lot
  5. 5. someone or something that is wicked
  6. 7. Worrying
  7. 9. very risky
  8. 11. full of happiness and joy
  9. 12. lacking in different tones
  10. 13. someone who has committed a wrongful act
  11. 15. agitated or alarmed
  12. 18. emits light