Theory:

The following is a list of compound nouns:
 
Numbers
Compound nouns
Examples in sentences
1.
Sister-in-law
My sister-in-law is the cruellest person I know.
2.
Truckful
We need a truckful of vegetables for the function.
3.
Past lives
Some people believe in past lives.
4.
Underworld
This city is vast, it has a thriving criminal underworld.
5.
Checkout
Checkout is at 2:00 pm.
6.
Breakfast
We always eat breakfast at 7:00 am.
7.
Football
Shall we play football today evening?
 
Important!
Click here for an extensive list of compound nouns.