(In parentheses is the number of dictionaries in which OneLook found the word.)
1. as (81)
2. ad (80)
3. Am (72)
4. An (68)
5. Ac (66)
6. at (65)
7. ar (62)
8. ab (61)
9. ap (56)
10. Ag (51)
11. al (51)
12. Av (46)
13. ax (45)
14. ah (43)
15. af (39)
16. Az (37)
17. Ak (33)
18. Aw (33)
19. aq (24)
20. aj (10)
21. a c (25)
22. a d (20)
23. a r (14)
24. a s (14)
25. a m (13)
26. a t (12)
27. a v (11)
28. a l (10)
29. a p (10)
30. a f (9)
31. a z (9)
32. a b (8)
33. a g (8)
34. a n (7)
35. a w (7)
36. a h (6)
37. a k (6)
38. a j (4)
39. a x (3)
40. an (1)