1. What do the following words have in common?

PINK
GREEN
BROWN

2. What do the following words have in common?

MILE
LUMP
CHEAP

Answers:

1. Each word can be followed by IE to make a new word:

PINKIE
GREENIE
BROWNIE

2. Each word can be anagrammed into a type of fruit:

MILE - LIME
LUMP - PLUM
CHEAP - PEACH