A C R O S S
 
2. Good afternoon
5. Good morning
6. A polite expression said
    after a meal
7. Let's start eating
    (a polite expression said after a meal)
8. Good night

D O W N
 
1. Good bye
2. Good evening
4. Good bye (said before parting for a long while)
3. How do you do?
5. Congratulations!