What do the following words have in common?

BIN
RAT
ROB
NINE
PRICE
STING
ROUSE

HINT:
The same two letters will change each word into a new one.

Answers:

Each word can be changed into a new one when preceded by CA:

CABIN
CARAT
CAROB
CANINE
CAPRICE
CASTING
CAROUSE

Credit: Elizabeth C. Gorski
CALCIUM SUPPLEMENTS