MISSING LINK CLV

Each trio of words below shares a Missing Link - that is, its members have something in common, obvious or not. For example, RIVERS, NOSES, & VIOLINS can all have BRIDGES.

1. Ethnic..........Private..........Blonde
2. Train..........Flight..........Wave
3. Lady..........Dumb..........Hard
4. Boom..........Home..........Down
5. Weight..........Number..........Bomb
6. Steam..........Scrap..........Waffle
7. House..........Flag..........Collar
8. Eggs..........Air..........Water
9. Corn..........Cotton..........Farm
10. Holy..........Mail..........Gag

Answers:

1. Kinds of jokes
2. Things you can catch
3. Luck
4. Town 
5. Atomic
6. Iron
7. White
8. Things you can walk on
9. Kinds of belts
10. Kinds of orders