What do the following words have in common?

LEER
AGUE
LIE
SHOE
CURE

HINT:
The answer involves the same, single letter.

Answer:

The letter V can be added to each word to create a new one:

LEER - LEVER
AGUE - VAGUE
LIE - LIVE
SHOE - SHOVE
CURE - CURVE

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
TAKE FIVE