Across
- 2. contain poison or produce poison
- 6. spread very quickly and difficult to stop
- 8. continue to live or exist despite a dangerous event or time
- 9. exist naturally in a place
- 10. an artificial river
Down
- 1. slightly wet, often in an unpleasant way
- 3. take the place of something else
- 4. to become very strong and healthy
- 5. the natural home of a plant or animal
- 7. to change, or make sb/sth change