Across
- 4. breaker
- 5. trajectory
- 7. undertow
- 8. flotsam
- 9. sepulchre
- 13. janus
- 14. annex
- 16. junction
- 18. maelstrom
- 19. platform
- 20. upthrow
- 22. transept
- 24. signal
- 27. cloister
- 29. orbit
- 31. splice
- 32. terminal
- 35. interchange
- 38. extension
- 40. concourse
- 45. rhythm
- 46. thoroughfare
- 48. lethal
- 49. medium
Down
- 1. underpinnings
- 2. substructure
- 3. crosscut
- 6. assemblage
- 10. viaduct
- 11. scaffold
- 12. conduit
- 15. commute
- 17. transfer
- 21. inexorable
- 23. subterranean
- 25. surge
- 26. jetsam
- 27. cycle
- 28. idyll
- 30. delta
- 33. pedway
- 34. circuit
- 36. riptide
- 37. estuary
- 39. excavation
- 41. strophe
- 42. stygian
- 43. timetable
- 44. catacomb
- 47. rapids