gh

Across

6. Flight
7. cough
9. Knight
12. Sight
15. Bright
17. Laugh
18. Tough
19. Sigh
20. Tight
21. Naughty

Down

1. freight
2. Daughter
3. Delight
4. Might
5. Rough
8. Enough
10. Fight
11. Fright
12. Sleigh
13. Ghost
14. Thigh
16. Caught