What do the following words have in common?

FOSTER
SAND
HOLIDAY
COURT
CLIFF
PIZZA
BOMB
CIRCUS
RADIO

(BIG)
HINT:
BUCKINGHAM could be added to the list.

Answer:

Each word can be followed by a word that describes some kind of residence.

Foster home
Sand castle
Holiday Inn
Courthouse
Cliff dwelling
Pizza Hut
Bomb shelter
Circus tent
Radio Shack
HINT: (Buckingham Palace)

Credit: Chicago Tribune Crossword (adapted)
Annabel Michaels - PEOPLE AND PLACES