1. What do the following words have in common?

CAR
CANT
EIGHT

2. What do the following words have in common?

MAR
BALL
CART
HARP

HINTS:

1. Each word changes to a new one when followed by the same three letters.
2. Each word changes to a new one when followed by the same three letters.

Answers:

1. Each word can be followed by EEN:

CAREEN / CANTEEN / EIGHTEEN

2. Each word can be followed by OON:

MAROON / BALLOON / CARTOON / HARPOON