tious, cious and ious

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Across
  1. 3. courteous, kind and pleasant, gracious
  2. 5. eager to know or learn something, curious
  3. 6. delightful in taste, delicious
  4. 7. nourishing; efficient as food, nutritious
  5. 8. having or showing a strong desire and determination to succeed, ambitious
  6. 9. used as a term of address for a beloved person, precious
  7. 10. very large in size, quantity, or extent, enormous
Down
  1. 1. likely to spread infection, infectious
  2. 2. careful to avoid potential problems or dangers, cautious
  3. 4. having or showing a belief in supernatural influences, especially as leading to good or bad luck, superstitious