How many words can you make out of springtime?

Here are all the Words I can think of...

1. springtime
2. spring
3. time
4. times
5. ring
6. rings
7. tin
8. tins
9. sir
10. sin
11. tie
12. ties
13. ping
14. pings
15. men
16. mens
17. net
18. nets
19. set
20. mit
21. mits

Hope this helps!