Crawl

Each floor contains a shop. Each shop will sell three random weapons. You must purchase a weapon for it to unlock in the vault. You dont have to use it against an enemy, but you must hold it.

There are 40 types of weapons.

Descriptions do not make a difference. Ie An Elite Partisan and a Dull Partisan both count as one weapon: Partisan.
The only exception is the descriptor Magic. Many weapons have Magic variants. These are counted as separate weapons.

Full list, in the order they appear in the Vault.
1. Rusted Blade
2. Shiv
3. Dagger
4. Cutthroat
5. Magic Dagger
6. Club
7. Magic Club
8. Battle Axe
9. Shortsword
10. Katana
11. Broadsword
12. Bloodletter
13. Warcleaver
14. Heroblade
15. Khopesh
16. Darkblade
17. Magic Sword
18. Estoc
19. Longsword
20. Greatsword
21. Claymore
22. Scimitar
23. Magic Longsword
24. Spear
25. Javeline
26. Harlberd
27. Partisan
28. Magic Spear
29. Throwing Knives
30. Kunai
31. Katar
32. Hooked Blades
33. Magic Hand Knives
34. Sling
35. Magic Sling
36. Bow
37. Magic Bow
38. Crossbow
39. Repeater
40. Magic Staff

Here's a video I made, showing all Vault items, including weapons.