Words ending 'ous'

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Across
  1. 7. Full of happiness.
  2. 8. Easy to see or understand
  3. 9. Very large.
  4. 10. Full of mountains.
Down
  1. 1. Wanting to learn more.
  2. 2. Likely to cause harm.
  3. 3. Important or not joking.
  4. 4. Harmful if touched or eaten.
  5. 5. Risky or unsafe.
  6. 6. Wanting what others have.