| 01. birlandagarri (13 Letters) | 02. birlandatu (10 Letters) | 03. birlandatze (11 Letters) |
| 04. birlandu (8 Letters) | 05. birlantze (9 Letters) | 06. birlari (7 Letters) |
| 07. birlelo (7 Letters) | 08. birloratu (9 Letters) | 09. birloratze (10 Letters) |
| 10. birlore (7 Letters) | 11. birlorgarri (11 Letters) | 12. birlorpen (9 Letters) |
| 13. birlortu (8 Letters) | 14. birlotu (7 Letters) | 15. birlotze (8 Letters) |
| 16. birmaniar (9 Letters) | 17. birmaniera (10 Letters) | 18. birmila (7 Letters) |
| 19. birmoldaketa (12 Letters) | 20. birmoldarazi (12 Letters) | 21. birmoldatu (10 Letters) |
| 22. birmoldizketa (13 Letters) | 23. biro (4 Letters) | 24. birpasa (7 Letters) |
| 25. birpentsatu (11 Letters) | 26. birplanteaketa (14 Letters) | 27. birplanteamendu (15 Letters) |
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| 28. birplanteatu (12 Letters) | 29. birpopulaketa (13 Letters) | 30. birpopulatu (11 Letters) |
| 31. birprofilaketa (14 Letters) | 32. birprofilatu (12 Letters) | 33. birraitona (10 Letters) |
| 34. birramona (9 Letters) | 35. birrefringente (14 Letters) | 36. birrefringentzia (16 Letters) |
| 37. birresku (8 Letters) | 38. birrin (6 Letters) | 39. birrin-birrin egin (18 Letters) |
| 40. birrindu (8 Letters) | 41. birringailu (11 Letters) | 42. birringarri (11 Letters) |
| 43. birrinketa (10 Letters) | 44. birrintzaile (12 Letters) | 45. birrintze (9 Letters) |
| 46. birritan (8 Letters) | 47. birsailkapen (12 Letters) | 48. birsaldu (8 Letters) |
| 49. birsalmenta (11 Letters) | 50. birsaltzaile (12 Letters) | 51. birsartu (8 Letters) |
| 52. birsartze (9 Letters) | 53. birsorkarri (11 Letters) | 54. birsorketa (10 Letters) |
| 55. birsorkuntza (12 Letters) | 56. birsortu (8 Letters) | 57. birsortzaile (12 Letters) |
| 58. birsortze (9 Letters) | 59. birtopo (7 Letters) | 60. birtual (7 Letters) |
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