Starting from the top left and reading left to right the answers are:
1. Death Valley
2. All in all
3. The pen is mightier than the sword
4. You win some and you lose some
5. Three degrees above 0
6. Crossbow
7. West Indies
8. Brains above brawn
9. Going over the speed limit
10. Peas in a pod
11. Scotch on the rocks
12. Hygiene
13. A little behind in my work
14. Corner table
15. Grand Rapids
16. Life insurance
17. ( 2 the ) To the N th degree
18. Teeny bopper
19. Sixth sense
20. Fancy that
I STILL WANT MORE WACKY WORDS!