| 01. biogeografia (12 Letters) | 02. biografia (9 Letters) | 03. biografo (8 Letters) |
| 04. bioineko (8 Letters) | 05. biokimika (9 Letters) | 06. biokimikari (11 Letters) |
| 07. biokimiko (9 Letters) | 08. bioklima (8 Letters) | 09. bioklimatologia (15 Letters) |
| 10. biola (5 Letters) | 11. biolentzia (10 Letters) | 12. bioleta (7 Letters) |
| 13. biolin (6 Letters) | 14. biolinista (10 Letters) | 15. biologia (8 Letters) |
| 16. biologiko (9 Letters) | 17. biologo (7 Letters) | 18. biolontxelo (11 Letters) |
| 19. biolontzelojole (15 Letters) | 20. biomasa (7 Letters) | 21. bionbo (6 Letters) |
| 22. biopolimero (11 Letters) | 23. biosfera (8 Letters) | 24. biotiko (7 Letters) |
| 25. biotopo (7 Letters) | 26. bioxido (7 Letters) | 27. biper (5 Letters) |
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| 28. bipi (4 Letters) | 29. bipiatu (7 Letters) | 30. bipihauts (9 Letters) |
| 31. bipil (5 Letters) | 32. bipilarazi (10 Letters) | 33. bipilarazte (11 Letters) |
| 34. bipildu (7 Letters) | 35. bipilki (7 Letters) | 36. bipiltasun (10 Letters) |
| 37. bipiltze (8 Letters) | 38. bipiramide (10 Letters) | 39. bipitsu (7 Letters) |
| 40. biplano (7 Letters) | 41. bipolar (7 Letters) | 42. biprisma (8 Letters) |
| 43. bipunttako (10 Letters) | 44. bira (4 Letters) | 45. bira egin (9 Letters) |
| 46. birabarki (9 Letters) | 47. birabide (8 Letters) | 48. biradera (8 Letters) |
| 49. biragune (8 Letters) | 50. biraka (6 Letters) | 51. biraka ibili (12 Letters) |
| 52. birakari (8 Letters) | 53. birakarki (9 Letters) | 54. biraketa (8 Letters) |
| 55. birakor (7 Letters) | 56. birakortasun (12 Letters) | 57. birakuntza (10 Letters) |
| 58. biral (5 Letters) | 59. biraldi (7 Letters) | 60. biran (5 Letters) |
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