The words below have something in common. Can you determine what it is?

TEST
APES
BODY
EDIT
FACES

HINT:
One letter in each word can be replaced by another letter to form a new word. The replacement letter is the same for all the clue words. 

Answer:

One letter in each clue word can be replaced by X to make a new word:

TEXT
APEX
BOXY
EXIT
FAXES 

Credit: NY Times Crossword
Patrick Berry - June 8, 2014
STRIKE ONE