The answer words to this flat differ by a single letter - and that letter is the last letter in each answer word.

A Little Bit of Advice

When you bite off much more than you
    can chew,
It's true, that you did   _ _ _ _ _ _ _ _ _ .
But you don't have to  _ _ _ _ _ _ _ _ _ .

HINT:
The first four letters of the answer words are OVER.

Answer:

Credit:
The Enigma
NPL Magazine
February, 2018
LEXMAN

OVERREACH
OVERREACT