20 Compound Words:
1. Airplane
2. Bathroom
3. Butterfly
4. Heartbeat
5. Moonlight
6. Rainbow
7. Sunrise
8. Firefly
9. Newspaper
10. Seashell
11. Snowflake
12. Starfish
13. Thunderstorm
14. Waterproof
15. Windmill
16. Bookworm
17. Hairspray
18. Keyboard
19. Skydiving
20. Underwater