Across
- 3. Division into separate parts
- 6. Smaller river flowing into a larger one
- 12. A dividing line
- 13. High-lying country
- 15. English river flowing through the Midlands
- 16. Ground beneath a flowing river
- 17. Border or dividing region
- 18. Deep narrow valley
- 20. Area drained by a river system
- 25. Relating to the banks of a river
- 26. High ground separating drainage areas
- 27. Low ground between hills, often containing a river
- 28. Relatively low-lying country
- 29. Division into two branches
- 32. River plunging over a drop
- 33. Removal or flow of surface water
- 34. A winding bend in a river
- 35. Course through which a river flows
- 36. Crest that may form a drainage boundary
- 37. Place where two rivers meet
Down
- 1. River's edge
- 2. Where a river enters the sea or another body of water
- 4. Land between two river valleys
- 5. Shallow river crossing
- 7. Natural stream of flowing water
- 8. Relating to a river
- 9. Act of dividing or keeping apart
- 10. Where a river begins
- 11. Area drained by a river system
- 14. Cut-off river bend
- 17. Flat land liable to flooding beside a river
- 19. Tidal river mouth
- 21. Fast-flowing stretch of rough water
- 22. Embankment built to contain a river
- 23. Source region of a river
- 24. Depositional landform at some river mouths
- 30. Area from which water flows into a river
- 31. Narrow steep-sided valley
- 32. Low barrier across a river
- 35. Coming together